Mayor and City Council of Baltimore v. BP P.L.C. ( 2022 )


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  •                                          PUBLISHED
    UNITED STATES COURT OF APPEALS
    FOR THE FOURTH CIRCUIT
    No. 19-1644
    MAYOR AND CITY COUNCIL OF BALTIMORE,
    Plaintiff - Appellee,
    v.
    BP P.L.C.; BP AMERICA, INC.; BP PRODUCTS NORTH AMERICA, INC.;
    CROWN CENTRAL LLC; CROWN CENTRAL NEW HOLDINGS LLC;
    CHEVRON CORP.; CHEVRON U.S.A. INC.; EXXON MOBIL CORP.;
    EXXONMOBIL OIL CORPORATION; CITGO PETROLEUM CORP.;
    CONOCOPHILLIPS; CONOCOPHILLIPS COMPANY; PHILLIPS 66;
    MARATHON OIL COMPANY; MARATHON OIL CORPORATION;
    MARATHON PETROLEUM CORPORATION; SPEEDWAY LLC; HESS CORP.;
    CNX RESOURCES CORPORATION; CONSOL ENERGY, INC.; CONSOL
    MARINE TERMINALS LLC; SHELL PLC; SHELL USA, INC.
    Defendants – Appellants
    and
    LOUISIANA LAND & EXPLORATION CO.; PHILLIPS 66 COMPANY;
    CROWN CENTRAL PETROLEUM CORPORATION.
    Defendants.
    --------------------------------
    CHAMBER OF COMMERCE OF THE UNITED STATES OF AMERICA;
    NATIONAL   ASSOCIATION   OF   MANUFACTURERS;     NATIONAL
    ASSOCIATION OF CONVENIENCE STORES; SOCIETY OF INDEPENDENT
    GASOLINE MARKETERS OF AMERICA; ENERGY MARKETERS OF
    AMERICA; ENERGY POLICY ADVOCATES; STATE OF INDIANA; STATE
    OF ALABAMA; STATE OF ALASKA; STATE OF ARKANSAS; STATE OF
    GEORGIA; STATE OF KANSAS; STATE OF KENTUCKY; STATE OF
    MISSISSIPPI; STATE OF MONTANA; STATE OF NEBRASKA; STATE OF
    SOUTH CAROLINA; STATE OF TEXAS; STATE OF UTAH; STATE OF
    WYOMING,
    Amici Supporting Appellant.
    NATIONAL LEAGUE OF CITIES; U. S. CONFERENCE OF MAYORS;
    INTERNATIONAL MUNICIPAL LAWYERS ASSOCIATION; PUBLIC
    CITIZEN, INC.; SHELDON WHITEHOUSE; EDWARD J. MARKEY; STATE OF
    MARYLAND; STATE OF CALIFORNIA; STATE OF CONNECTICUT; STATE
    OF NEW JERSEY; STATE OF NEW YORK; STATE OF OREGON; STATE OF
    RHODE ISLAND; STATE OF VERMONT; STATE OF WASHINGTON; MARIO
    J. MOLINA; MICHAEL OPPENHEIMER; BOB KOPP; FRIEDERIKE OTTO;
    SUSANNE C. MOSER; DONALD J. WUEBBLES; GARY GRIGGS; PETER C.
    FRUMHOFF; KRISTINA DAHL; NATURAL RESOURCES DEFENSE
    COUNCIL; ROBERT BRULLE; CENTER FOR CLIMATE INTEGRITY;
    CHESAPEAKE CLIMATE ACTION NETWORK; JUSTIN FARRELL; BEN
    FRANTA; STEPHAN LEWANDOWSKY; NAOMI ORESKES; GEOFFREY
    SUPRAN; UNION OF CONCERNED SCIENTISTS; SCHOLARS OF FOREIGN
    RELATIONS AND FEDERAL COURTS; STATE OF DELAWARE; STATE OF
    HAWAI"I; STATE OF MAINE; STATE OF MINNESOTA; STATE OF NEW
    MEXICO; COMMONWEALTH OF MINNESOTA; DISTRICT OF COLUMBIA,
    Amici Supporting Appellee.
    On Remand from the Supreme Court of the United States.
    (S. Ct. No. 19-1189)
    Argued: January 25, 2022                                    Decided: April 7, 2022
    Before GREGORY, Chief Judge, THACKER, Circuit Judge, and FLOYD, Senior Circuit
    Judge.
    Affirmed by published opinion. Senior Judge Floyd wrote the opinion in which Chief
    Judge Gregory and Judge Thacker joined.
    2
    ARGUED:         Kannon K. Shanmugam, PAUL, WEISS, RIFKIND, WHARTON,
    GARRISON, LLP, Washington, D.C., for Appellants. Victor Marc Sher, SHER EDLING
    LLP, San Francisco, California, for Appellees. ON BRIEF: Theodore J. Boutrous, Jr.,
    Los Angeles, California, Anne Champion, New York, New York, Joshua S. Lipshutz,
    Thomas G. Hungar, GIBSON, DUNN & CRUTCHER LLP, Washington, D.C.; Ty Kelly,
    Jonathan Biran, BAKER DONELSON, BEARMAN, CALDWELL & BERKOWITZ,
    P.C., Baltimore, Maryland, for Appellants Chevron Corporation and Chevron U.S.A., Inc.
    John B. Isbister, Jaime W. Luse, TYDINGS & ROSENBERG LLP, Baltimore, Maryland;
    Philip H. Curtis, Nancy G. Milburn, New York, New York, Matthew T. Heartney, John D.
    Lombardo, ARNOLD & PORTER KAYE SCHOLER LLP, Los Angeles, California, for
    Appellants BP Products North America Inc., BP P.L.C., and BP America Inc. Craig A.
    Thompson, VENABLE LLP, Baltimore, Maryland; Theodore V. Wells, Jr., Daniel J. Toal,
    Jaren Janghorbani, PAUL, WEISS, RIFKIN, WHARTON, GARRISON LLP, New York,
    New York, for Exxon Mobil Corporation and ExxonMobil Oil Corporation. David C.
    Frederick, James M. Webster, III, Brendan J. Crimmins, Grace W. Knofczynski, Daniel S.
    Severson, KELLOGG, HANSEN, TODD, FIGEL & FREDERICK, P.L.L.C., Washington,
    D.C.; Daniel B. Levin, Los Angeles, California, Jerome C. Roth, Elizabeth A. Kim,
    MUNGER, TOLLES & OLSON LLP, San Francisco, California, for Appellants Shell
    USA, Inc. and Shell plc. Warren N. Weaver, Peter Sheehan, WHITEFORD TAYLOR
    AND PRESTON LLP, Baltimore, Maryland; Nathan P. Eimer, Pamela R. Hanebutt, Ryan
    Walsh, Raphael Janove, EIMER STAHL LLP, Chicago, Illinois, for Appellant Citgo
    Petroleum Corporation.       Michael A. Brown, NELSON MULLINS RILEY &
    SCARBOROUGH LLP, Baltimore, Maryland; David B. Hamilton, Hillary V. Colonna,
    Sarah E. Meyer, WOMBLE BOND DICKINSON LLP, Baltimore, Maryland; Sean C.
    Grimsley, Jameson R. Jones, Daniel R. Brody, BARTLIT BECK LLP, Denver, Colorado,
    for Appellants ConocoPhillips and ConocoPhillips Company. Steven M. Bauer, Margaret
    A. Tough, LATHAM & WATKINS LLP, San Francisco, California, for Appellants
    ConocoPhillips, ConocoPhillips Company, and Phillips 66. Jonathan Chunwei Su,
    LATHAM & WATKINS LLP, Washington, D.C., for Appellant Phillips 66. Shannon S.
    Broome, San Francisco, California, Shawn Patrick Regan, New York, New York, Ann
    Marie Mortimer, HUNTON ANDREWS KURTH LLP, Los Angeles, California, for
    Appellants Marathon Petroleum Corp. and Speedway, LLC. Scott Janoe, Houston, Texas,
    Martha Thomsen, Megan Berge, Emily Wilson, BAKER BOTTS L.L.P., Washington,
    D.C., for Appellant Hess Corp. Michelle N. Lipkowitz, Thomas K. Prevas, SAUL EWING
    ARNSTEIN & LEHR LLP, Baltimore, Maryland, for Appellants Crown Central LLC and
    Crown Central New Holdings LLC. Kathleen Taylor Sooy, Tracy Ann Roman,
    Washington, D.C., Honor R. Costello, CROWELL & MORING LLP, New York, New
    York, for Appellants CNX Resources Corporation, Consol Energy Inc., and Consol Marine
    Terminals LLC. Noel J. Francisco, David M. Morrell, J. Benjamin Aguiñaga, Washington,
    D.C., David C. Kiernan, JONES DAY, San Francisco, California, for Appellant CNX
    Resources Corporation. Mark S. Saudek, GALLAGHER EVELIUS & JONES LLP,
    Baltimore, Maryland; James Stengel, New York, New York, Robert Reznick, ORRICK,
    HERRINGTON & SUTCLIFFE, LLP, Washington, D.C., for Appellants Marathon Oil
    3
    Corporation and Marathon Oil Company. Andre M. Davis, Suzanne Sangree, Sara Gross,
    BALTIMORE CITY LAW DEPARTMENT, Baltimore, Maryland; Matthew K. Edling,
    SHER EDLING LLP, San Francisco, California, for Appellee. Steven P. Lehotsky,
    Michael B. Schon, Andrew R. Varcoe, Stephanie A. Maloney, U.S. CHAMBER
    LITIGATION CENTER, Washington, D.C.; Peter D. Keisler, C. Frederick Beckner III,
    Ryan C. Morris, Tobias S. Loss-Eaton, SIDLEY AUSTIN LLP, Washington, D.C.;
    William M. Jay, Andrew Kim, GOODWIN PROCTER LLP, Washington, D.C., for
    Amicus The Chamber of Commerce of the United States of America. Michael Burger,
    Susan Kraham, MORNINGSIDE HEIGHTS LEGAL SERVICES, INC., New York, New
    York, for Amici The National League of Cities, the U.S. Conference of Mayors, and the
    International Municipal Lawyers Association. Scott L. Nelson, Allison M. Zieve, PUBLIC
    CITIZEN LITIGATION GROUP, Washington, D.C., for Amicus Public Citizen, Inc.
    Gerson H. Smoger, SMOGER & ASSOCIATES, P.C., Dallas, Texas; Robert S. Peck,
    CENTER FOR CONSTITUTIONAL LITIGATION, P.C., Washington, D.C., for Amici
    Senators Sheldon Whitehouse and Edward J. Markey. Brian E. Frosh, Attorney General,
    Joshua M. Segal, Special Assistant Attorney General, Steven J. Goldstein, Special
    Assistant Attorney General, OFFICE OF THE ATTORNEY GENERAL OF
    MARYLAND, Baltimore, Maryland, for Amicus State of Maryland. Rob Bonta, Attorney
    General, OFFICE OF THE ATTORNEY GENERAL OF CALIFORNIA, Sacramento,
    California, for Amicus State of California. Kathleen Jennings, Attorney General, OFFICE
    OF THE ATTORNEY GENERAL OF DELAWARE, Wilmington, Delaware, for Amicus
    State of Delaware. William Tong, Attorney General, OFFICE OF THE ATTORNEY
    GENERAL OF CONNECTICUT, Hartford, Connecticut, for Amicus State of Connecticut.
    Karl A. Racine, Attorney General, OFFICE OF THE ATTORNEY GENERAL OF THE
    DISTRICT OF COLUMBIA, Washington, D.C., for Amicus District of Columbia. Clare
    E. Connors, Attorney General, OFFICE OF THE ATTORNEY GENERAL OF HAWAII,
    Honolulu, Hawaii, for Amicus State of Hawaii. Maura Healey, Attorney General, OFFICE
    OF THE ATTORNEY GENERAL OF MASSACHUSETTS, Boston, Massachusetts, for
    Amicus Commonwealth of Massachusetts. Andrew J. Bruck, Acting Attorney General,
    OFFICE OF THE ATTORNEY GENERAL OF NEW JERSEY, Trenton, New Jersey, for
    Amicus State of New Jersey. Ellen F. Rosenblum, Attorney General, OFFICE OF THE
    ATTORNEY GENERAL OF OREGON, Salem, Oregon, for Amicus State of Oregon.
    Thomas J. Donovan, Jr., Attorney General, OFFICE OF THE ATTORNEY GENERAL
    OF VERMONT, Montpelier, Vermont, for Amicus State of Vermont. Letitia James,
    Attorney General, OFFICE OF THE ATTORNEY GENERAL OF NEW YORK, Albany,
    New York, for Amicus State of New York. Aaron M. Frey, Attorney General, OFFICE
    OF THE ATTORNEY GENERAL OF MAINE, Augusta, Maine, for Amicus State of
    Maine. Keith Ellison, Attorney General, OFFICE OF THE ATTORNEY GENERAL OF
    MINNESOTA, Saint Paul, Minnesota, for Amicus State of Minnesota. Hector Balderas,
    Attorney General, OFFICE OF THE ATTORNEY GENERAL OF NEW MEXICO, Santa
    Fe, New Mexico, for Amicus State of New Mexico. Peter F. Neronha, Attorney General,
    OFFICE OF THE ATTORNEY GENERAL OF RHODE ISLAND, Providence, Rhode
    Island, for Amicus State of Rhode Island. Robert W. Ferguson, Attorney General, OFFICE
    4
    OF THE ATTORNEY GENERAL OF WASHINGTON, Olympia, Washington, for
    Amicus State of Washington. William A. Rossbach, ROSSBACH LAW, PC, Missoula,
    Montana, for Amici Mario J. Molina, Michael Oppenheimer, Bob Kopp, Friederike Otto,
    Susanne C. Moser, Donald J. Wuebbles, Gary Griggs, Peter C. Frumhoff, and Kristina
    Dahl. Peter Huffman, NATURAL RESOURCES DEFENSE COUNCIL, Washington,
    D.C., for Amicus Natural Resources Defense Council. Mark A. Griffin, Amy Williams-
    Derry, Daniel P. Mensher, Alison S. Gaffney, KELLER ROHRBACK L.L.P., Seattle,
    Washington, for Amici Robert Brulle, Center for Climate Integrity, The Chesapeake
    Climate Action Network, Justin Farrell, Benjamin Franta, Stephan Lewandowsky, Naomi
    Oreskes, Geoffrey Supran, and the Union of Concerned Scientists. Theodore E. Roitka,
    Attorney General, Thomas M. Fisher, Solicitor General, Kian J. Hudson, Deputy Solicitor
    General, Julia C. Payne, Deputy Attorney General, OFFICE OF THE ATTORNEY
    GENERAL OF INDIANA, Indianapolis, Indiana, for Amicus State of Indiana. Steve
    Marshall, Attorney General, OFFICE OF THE ATTORNEY GENERAL OF ALABAMA,
    Montgomery, Alabama, for Amicus State of Alabama. Treg R. Taylor, Attorney General,
    OFFICE OF THE ATTORNEY GENERAL OF ALASKA, Anchorage, Alaska, for
    Amicus State of Alaska. Leslie Rutledge, Attorney General, OFFICE OF THE
    ATTORNEY GENERAL OF ARKANSAS, Little Rock, Arkansas, for Amicus State of
    Arkansas. Christopher Carr, Attorney General, OFFICE OF THE ATTORNEY
    GENERAL OF GEORGIA, Atlanta, Georgia, for Amicus State of Georgia. Derek
    Schmidt, Attorney General, OFFICE OF THE ATTORNEY GENERAL OF KANSAS,
    Topeka, Kansas, for Amicus State of Kansas. Daniel Cameron, Attorney General, OFFICE
    OF THE ATTORNEY GENERAL OF KENTUCKY, Frankfort, Kentucky, for Amicus
    Commonwealth of Kentucky. Lynn Fitch, Attorney General, OFFICE OF THE
    ATTORNEY GENERAL OF MISSISSIPPI, Jackson, Mississippi, for Amicus State of
    Mississippi. Austin Knudsen, Attorney General, OFFICE OF THE ATTORNEY
    GENERAL OF MONTANA, Helena, Montana, for Amicus State of Montana. Doug
    Peterson, Attorney General, OFFICE OF THE ATTORNEY GENERAL OF NEBRASKA,
    Lincoln, Nebraska, for Amicus State of Nebraska. Alan Wilson, Attorney General,
    OFFICE OF THE ATTORNEY GENERAL OF SOUTH CAROLINA, Columbia, South
    Carolina, for Amicus State of South Carolina. Ken Paxton, Attorney General, OFFICE OF
    THE ATTORNEY GENERAL OF TEXAS, Austin, Texas, for Amicus State of Texas.
    Sean D. Reyes, Attorney General, OFFICE OF THE ATTORNEY GENERAL OF UTAH,
    Salt Lake City, Utah, for Amicus State of Utah. Bridget Hill, Attorney General, OFFICE
    OF THE ATTORNEY GENERAL OF WYOMING, Cheyenne, Wyoming, for Amicus
    State of Wyoming. Linda E. Kelly, Patrick Hedren, Erica Klenicki, MANUFACTURERS’
    CENTER FOR LEGAL ACTION, Washington, D.C., for Amicus National Association of
    Manufacturers. Philip S. Goldberg, Christopher E. Appel, SHOOK HARDY & BACON
    L.L.P., Washington, D.C., for Amici National Association of Manufacturers, National
    Association of Convenience Stores, Society of Independent Gasoline Marketers of
    America, and Energy Marketers of America. Matthew D. Hardin, HARDIN LAW
    OFFICE, Washington, D.C., for Amicus Energy Policy Advocates. Anna C. Haac, Hassan
    A. Zavareei, TYCKO & ZAVAREEI LLP, Washington, D.C., for Amici Scholars of
    5
    Foreign Relations and Federal Courts.
    6
    FLOYD, Senior Circuit Judge:
    This appeal returns to us on remand from the Supreme Court, and we are now
    tasked with examining the entirety of the district court’s remand order to determine if the
    climate-change lawsuit in question was properly removed to federal court. BP P.L.C. v.
    Mayor & City Council of Balt., 
    141 S. Ct. 1532
    , 1538, 1543 (2021). To accomplish that
    charge, we must evaluate eight distinct grounds for removal that twenty-six multinational
    oil and gas companies (Defendants) 1 maintain provide federal jurisdiction over the Mayor
    and City Council of Baltimore’s (Baltimore) climate-change action. Because we conclude
    that none of Defendants’ bases for removal permit the exercise of federal jurisdiction, we
    affirm the district court’s remand order.
    I.
    A.
    In July 2018, Baltimore filed suit in the Circuit Court for Baltimore City against
    Defendants. According to Baltimore, Defendants substantially contributed to greenhouse-
    gas pollution, global warming, and climate change by extracting, producing, promoting,
    1
    Defendants consist of BP entities (BP P.L.C.; BP America, Inc.; and BP Products North
    America Inc.); Crown Central entities (Crown Central Petroleum Corporation; Crown
    Central LLC; and Crown Central New Holdings LLC); Chevron entities (Chevron Corp.
    and Chevron U.S.A. Inc.); Exxon Mobil entities (Exxon Mobil Corp. and ExxonMobil Oil
    Corporation); Shell entities (Shell PLC and Shell USA, Inc.); Citgo Petroleum Corp.;
    ConocoPhillips entities (ConocoPhillips; ConocoPhillips Company; Louisiana Land &
    Exploration Co.; Phillips 66; and Phillips 66 Company); Marathon entities (Marathon Oil
    Company; Marathon Oil Corporation; Marathon Petroleum Corporation; and Speedway
    LLC); Hess Corp.; and CONSOL entities (CNX Resources Corporation; CONSOL Energy
    Inc.; and CONSOL Marine Terminals LLC).
    7
    refining, marketing, distributing, and selling fossil-fuel products (i.e., coal, oil, and natural
    gas). Baltimore asserts that Defendants deceived consumers and the public about the
    dangers associated with their fossil-fuel products when they knew, for nearly fifty years,
    of a direct link between their products and climate-change threats. With that knowledge,
    as Baltimore alleges, Defendants (1) employed a “coordinated, multi-front effort to conceal
    and deny their own knowledge of those threats”; (2) discredited “publicly available
    scientific evidence”; and (3) created persistent doubt within the public sphere about the
    “reality and consequences of the impacts of their fossil[-]fuel pollution.” J.A. 43. But that
    is not all.   Baltimore’s Complaint emphasizes that Defendants’ other actions also
    contributed to climate change and Baltimore’s own harms: “Defendants individually and
    collectively manufactured, promoted, marketed, and sold a substantial percentage of all
    fossil[-]fuel products ultimately used and combusted.” J.A. 139 (emphasis added).
    Resulting from Defendants’ collective conduct, Baltimore avers it has suffered
    “climate[-]change-related injuries,” including “sea level rise and associated impacts,
    increased frequency and severity of extreme precipitation events, increased frequency and
    severity of drought, increased frequency and severity of heat waves and extreme
    temperatures, and consequent social and economic injuries associated with those physical
    and environmental changes . . . .” J.A. 92, 140–41 (emphasis added). Within Baltimore’s
    boundaries, these environmental events have purportedly caused, among other things,
    infrastructure damage during floods, automobile accidents and power outages when winter
    storms hit, and public-health illnesses amid heat waves.
    8
    Essentially, Baltimore’s Complaint seeks to shift the burden of its climate-change
    costs onto Defendants: “[Baltimore] seeks to ensure that the parties who have profited
    from externalizing the responsibility for sea level rise, extreme precipitation events,
    heatwaves, other results of the changing hydrologic regime caused by increasing
    temperatures, and associated consequences of those physical and environmental changes,
    bear the costs of those impacts on . . . [Baltimore] . . . .” J.A. 47. Baltimore, however,
    “does not seek to impose liability on Defendants for their direct emissions of greenhouse
    gases and does not seek to restrain Defendants from engaging in their business operations.”
    J.A. 47.
    Baltimore brings eight causes of action against Defendants, all under Maryland law:
    (1) public nuisance; (2) private nuisance; (3) strict liability for failure to warn; (4) strict
    liability for design defect; (5) negligent design defect; (6) negligent failure to warn; (7)
    trespass; and (8) violations of the Maryland Consumer Protection Act (MCPA), 
    Md. Code Ann., Com. Law §§ 13-101
     to -501. Each of Baltimore’s claims are factually premised on
    Defendants’ “superior knowledge” of the negative, climate-change impacts attributable to
    their fossil-fuel products.    J.A. 150.     And that “superior knowledge” stems from
    Defendants’ control over the “extraction, refining, development, marketing, and sale of
    [their] fossil[-]fuel products.” J.A. 150 (public nuisance); see also J.A. 156 (alleging, for
    private nuisance, Defendants possessed “extensive knowledge” of their fossil-fuel
    products’ hazards); J.A. 157, 166 (maintaining, for strict liability for failure to warn and
    negligent failure to warn, Defendants breached a duty of care by failing to adequately warn
    about the “climate effects that inevitably flow from the intended use of their fossil[-]fuel
    9
    products” when they had “information passed to them from their internal research
    divisions”); J.A. 160 (asserting, for strict liability for design defect, “Defendants had
    control over . . . the manufacturing and distribution processes”); J.A. 163 (contending, for
    negligent design defect, Defendants allowed their fossil-fuel products to enter the stream
    of commerce “despite knowing them to be defective”); J.A. 168 (asserting, for trespass,
    flood waters entered Baltimore’s real property because of Defendants’ fossil-fuel products
    and their knowledge of those products); J.A. 171 (alleging Defendants violated the MCPA
    by making (1) false and misleading statements, and (2) false representations and misleading
    omissions about their fossil-fuel products).
    To remedy its harms, Baltimore seeks compensatory and punitive damages,
    disgorgement of profits, civil penalties under the MCPA, and equitable relief, including the
    abatement of the alleged nuisances and an injunction against future nuisances.
    B.
    After Baltimore’s suit was filed in state court in July 2018, Defendants Chevron
    Corp. and Chevron U.S.A. timely removed Baltimore’s Complaint to the United States
    District Court for the District of Maryland. Chevron asserted eight different grounds for
    removal under statutory grants of federal jurisdiction and various legal theories, including:
    (1) federal common law; (2) substantial issues of federal law, as well as foreign affairs,
    under Grable & Sons Metal Products, Inc. v. Darue Engineering & Manufacturing, 
    545 U.S. 308
     (2005); (3) complete preemption under the Clean Air Act (CAA), 
    42 U.S.C. §§ 7401
    –7671q; (4) federal enclaves; (5) the Outer Continental Shelf Lands Act (OCSLA),
    10
    
    43 U.S.C. § 1349
    (b)(1); (6) the bankruptcy removal statute, 
    28 U.S.C. § 1452
    (a); (7) the
    admiralty jurisdiction statute, 
    28 U.S.C. § 1333
    (1); and (8) the federal officer removal
    statute, 
    28 U.S.C. § 1442
    (a)(1).
    Responding to Chevron’s removal, Baltimore filed a motion to remand its
    Complaint back to state court. After considering the parties’ filings, on June 10, 2019, the
    district court granted Baltimore’s Motion to Remand in a forty-five-page order and opinion,
    rejecting each of Defendants’ eight grounds for removal. Mayor & City Council of Balt.
    v. BP P.L.C., 
    388 F. Supp. 3d 538
     (D. Md. 2019). Defendants appealed the district court’s
    remand order to this Court. Mayor & City Council of Balt. v. BP P.L.C., 
    952 F.3d 452
     (4th
    Cir. 2020). We reasoned that, under 
    28 U.S.C. § 1447
    (d), we could only analyze the
    propriety of removal under the federal officer removal statute and lacked appellate
    jurisdiction over the remaining seven grounds for removal. Id. at 461. We ultimately held
    that federal officer removal was improper and affirmed the district court’s remand order
    on that sole ground. Id. at 461–70.
    Defendants appealed to the Supreme Court.          The Supreme Court held that,
    under § 1447(d), this Court is not divested of appellate jurisdiction over Defendants’ other
    theories of removal and may consider all the bases for removal included within the district
    court’s remand order. BP P.L.C., 141 S. Ct. at 1538, 1543. When vacating our opinion
    and remanding for further proceedings, the Court declined Defendants’ invitation to
    analyze their remaining removal bases and found that the “wiser course” was for this Court
    to examine them in the first instance. Id. at 1543. The Court did not address our rejection
    of Defendants’ invocation of the federal officer removal statute. Id. at 1543.
    11
    Following the Court’s holding and mandate, we now evaluate the remaining theories
    of removal Defendants proffer. Since Defendants relied upon the federal officer removal
    statute as a path to federal court, we possess appellate jurisdiction to review the entirety of
    the district court’s remand order under § 1447(d). BP P.L.C., 141 S. Ct. at 1538.
    II.
    Under the general removal statute, “any civil action brought in a State court of which
    the district courts of the United States have original jurisdiction, may be removed by the
    defendant or the defendants, to the district court of the United States for the district and
    division embracing the place where such action is pending.” 
    28 U.S.C. § 1441
    (a). In turn,
    federal district courts typically have original jurisdiction over cases involving federal
    questions “arising under the Constitution, laws, or treaties of the United States.”
    
    Id.
     § 1331. We refer to jurisdiction under § 1331 as federal-question jurisdiction. See
    McCormick v. Am. Online, Inc., 
    909 F.3d 677
    , 679 (4th Cir. 2018).
    “We review de novo issues of subject matter jurisdiction, including removal.”
    Common Cause v. Lewis, 
    956 F.3d 246
    , 252 (4th Cir. 2020) (citation omitted); see also
    Prince v. Sears Holdings Corp., 
    848 F.3d 173
    , 176 (4th Cir. 2017). “The party seeking
    removal bears the burden of showing removal is proper.” Prince, 848 F.3d at 176 (citation
    omitted); see also Strawn v. AT & T Mobility LLC, 
    530 F.3d 293
    , 297 (4th Cir. 2008).
    “Because removal jurisdiction raises significant federalism concerns, we must strictly
    construe removal jurisdiction.” Mulcahey v. Columbia Organic Chems. Co., Inc., 
    29 F.3d 12
    148, 151 (4th Cir. 1994) (citation omitted). “If federal jurisdiction is doubtful, a remand is
    necessary.” 
    Id.
     (citations omitted).
    III.
    Before considering the merits of Defendants’ grounds for removal, we must look to
    two legal doctrines that inform any removal inquiry before a federal court: (1) the well-
    pleaded complaint rule, and (2) complete preemption. See Rivet v. Regions Bank of La.,
    
    522 U.S. 470
    , 475–76 (1998). We recount them in turn.
    First, “[t]he well-pleaded complaint rule applies to the original jurisdiction of the
    district courts as well as to their removal jurisdiction.” Franchise Tax Bd. of Cal. v. Constr.
    Laborers Vacation Tr. for S. Cal., 
    463 U.S. 1
    , 10 n.9 (1983) (citations omitted). When
    applying the well-pleaded complaint rule to removal and federal-question jurisdiction, we
    have stated that “courts ‘ordinarily . . . look no further than the plaintiff’s [properly
    pleaded] complaint in determining whether a lawsuit raises issues of federal law capable
    of creating federal-question jurisdiction under 
    28 U.S.C. § 1331
    .’” Pinney v. Nokia, Inc.,
    
    402 F.3d 430
    , 442 (4th Cir. 2005) (alteration in original) (quoting Custer v. Sweeny, 
    89 F.3d 1156
    , 1165 (4th Cir. 1996)). In numerous cases, the Supreme Court has reiterated
    that federal-question jurisdiction “must be determined from what necessarily appears in the
    plaintiff’s statement of his own claim in the bill or declaration, unaided by anything alleged
    in anticipation of avoidance of defenses which it is thought the defendant may interpose.”
    Aetna Health Inc. v. Davila, 
    542 U.S. 200
    , 207 (2004) (quoting Taylor v. Anderson, 
    234 U.S. 74
    , 75–76 (1914)); see also Beneficial Nat’l Bank v. Anderson, 
    539 U.S. 1
    , 6 (2003);
    13
    Okla. Tax Comm’n v. Graham, 
    489 U.S. 838
    , 840–41 (1989); Metro. Life Ins. Co. v. Taylor,
    
    481 U.S. 58
    , 63 (1987).
    Using this well-known principle in practice, federal courts must first decide whether
    federal or state law creates the cause of action by viewing the face of a plaintiff’s complaint.
    Pinney, 
    402 F.3d at 442
    . If federal law, as opposed to state law, creates a plaintiff’s cause
    of action, then removal is proper. 
    Id.
     “The general rule, of course, is that a plaintiff is the
    ‘master of the claim,’ and he may ‘avoid federal jurisdiction by exclusive reliance on state
    law’ in drafting his complaint.” 
    Id.
     (quoting Caterpillar Inc. v. Williams, 
    482 U.S. 386
    ,
    392 (1987)). A plaintiff’s complaint “may not be removed to federal court on the basis of
    a federal defense, including the defense of pre-emption, even if the defense is anticipated
    in the plaintiff’s complaint, and even if both parties concede that the federal defense is the
    only question truly at issue.” Caterpillar, 
    482 U.S. at 393
     (citation omitted); see also
    Burrell v. Bayer Corp., 
    918 F.3d 372
    , 381 (4th Cir. 2019).
    Second, the doctrine of complete preemption, unlike ordinary preemption, is a
    recognized exception to the well-pleaded complaint rule. See Aetna Health, 
    542 U.S. at
    207–08. Complete preemption is an “independent corollary” to the well-pleaded complaint
    rule. Franchise Tax Bd., 
    463 U.S. at 22
    . As a jurisdictional doctrine, “[it] has the effect
    of ‘transform[ing]’ a state-law cause of action into one arising under federal law because
    Congress has occupied the field so thoroughly as to leave no room for state-law causes of
    action at all.” Johnson v. Am. Towers, LLC, 
    781 F.3d 693
    , 702 (4th Cir. 2015) (second
    alteration in original) (quoting Caterpillar, 
    482 U.S. at 399
    ). Complete preemption thus
    treats a state-law cause of action as based on a federal statute “in reality,” meaning that,
    14
    under such circumstances, there is “no such thing” as that state-law claim. Beneficial Nat’l
    Bank, 
    539 U.S. at 8, 11
    . In contrast, ordinary preemption is not a jurisdictional doctrine
    because it “simply declares the primacy of federal law, regardless of the forum or the
    claim.” 2 Lontz v. Tharp, 
    413 F.3d 435
    , 440 (4th Cir. 2005) (citation omitted). Ordinary
    preemption is a federal defense to a plaintiff’s claims, and it cannot serve as a valid basis
    for removal. Caterpillar, 
    482 U.S. at 393
    ; see also Skidmore v. Norfolk S. Ry. Co., 
    1 F.4th 206
    , 211–12 (4th Cir. 2021). Indeed, we have recognized that civil defendants “may not
    defend [their] way into federal court” as a way to bypass the well-pleaded complaint rule.
    In re Blackwater Sec. Consulting, LLC, 
    460 F.3d 576
    , 584 (4th Cir. 2006). On the other
    hand, if a court instead decides that a state-law cause of action is completely preempted by
    federal law, removal is proper. Lontz, 
    413 F.3d at
    439–40; see also Rivet, 
    522 U.S. at 475
    (noting that the “artful pleading doctrine” permits removal when a federal statute
    “completely preempts” a state-law claim).
    2
    Under the Supremacy Clause, federal law is the “supreme Law of the Land.” U.S. Const.
    art. VI, cl. 2. There are three types of ordinary preemption: (1) express preemption; (2)
    conflict preemption; and (3) field preemption. See Murphy v. Nat’l Collegiate Athletic
    Ass’n, 
    138 S. Ct. 1461
    , 1480 (2018); see also W. Star Hosp. Auth. Inc. v. City of Richmond,
    
    986 F.3d 354
    , 360 (4th Cir. 2021). In contrast to complete preemption, these three
    preemption doctrines serve as substantive defenses and do not implicate federal
    jurisdiction. See Whitehurst v. 1199SEIU United Healthcare Workers E., 
    928 F.3d 201
    ,
    206 n.2 (2d Cir. 2019); Retail Prop. Tr. v. United Brotherhood of Carpenters & Joiners of
    Am., 
    768 F.3d 938
    , 948–49 (9th Cir. 2014); see also Lontz, 
    413 F.3d at 440
    . Because we
    are only concerned with removal jurisdiction and complete preemption’s application, we
    need not to delve into these defenses at Defendants’ disposal. See Beneficial Nat’l Bank,
    
    539 U.S. at 6
     (noting that federal defenses do not oust jurisdiction).
    15
    As we have explained, “[c]omplete preemption applies only when ‘Congress has
    clearly manifested an intent to make causes action . . . removable to federal court.’”
    Johnson, 781 F.3d at 702 (quoting Metro. Life, 
    481 U.S. at 66
    ). The congressional intent
    to displace state law “must be clear in the text of the statute.” Lontz, 
    413 F.3d at
    441 (citing
    Metro. Life, 
    481 U.S. at
    65–66). Given that exacting requirement, there is a rebuttable
    presumption against finding the complete preemption of state-law claims. Id. at 440. And
    the presumption can only be overcome if the removing party satisfies its “significant
    burden” of “establish[ing] [a] congressional intent to extinguish similar state claims by
    making the federal cause of action exclusive.” Id. at 441. In sum, we thus permit complete-
    preemption findings when: “(1) the preempting statute displays a clear congressional intent
    to ‘entirely displace’ state law; and (2) the preempting statute creates an exclusive federal
    cause of action in an area of ‘overwhelming national interest.’” Norfolk S. Ry., 1 F.4th at
    212 (quoting Lontz, 
    413 F.3d at 441
    ).
    IV.
    With those legal principles informing our removal inquiry, we now examine, in turn,
    Defendants’ eight grounds for removal: (1) federal common law; (2) substantial issues of
    federal law, including foreign affairs, under Grable; (3) complete preemption under the
    CAA, 
    42 U.S.C. §§ 7401
    –7671q; (4) federal enclaves; (5) the OCSLA, 
    43 U.S.C. § 1349
    (b)(1); (6) the bankruptcy removal statute, 
    28 U.S.C. § 1452
    (a); (7) the
    admiralty jurisdiction statute, 
    28 U.S.C. § 1333
    (1); and (8) the federal officer removal
    statute, 
    28 U.S.C. § 1442
    (a)(1).
    16
    A.
    As their primary vehicle for federal jurisdiction, Defendants insist that Baltimore’s
    Complaint is “necessarily and exclusively governed by federal common law.” Defs.’
    Suppl. Br. 3; see also Defs.’ Opening Br. 15–22. According to Defendants, even though
    the Complaint never says anything about federal common law, Baltimore’s claims are
    “inherently federal and necessarily arise under federal law because they seek to impose
    liability based on the production and sale of oil and gas abroad.” Defs.’ Suppl. Br. at 8.
    They specifically characterize Baltimore’s claims as “interstate-pollution claims” that arise
    under federal common law. Id. at 16; see also id. at 3, 7–8, 19 (likening Baltimore’s causes
    of action to interstate and/or international pollution). Defendants never point to the specific
    cause of action under federal common law. Unsurprisingly, Baltimore stresses its suit has
    “nothing to do with any body of federal common law.” Baltimore’s Suppl. Br. 7. For the
    reasons set forth below, we resoundingly agree with Baltimore and reject Defendants’
    attempts to invoke federal common law.
    1.
    At the outset, we note that Baltimore’s Complaint never expressly asserts any claim
    under federal common law.         And Defendants do not contest otherwise.            Because
    Baltimore’s Complaint does not propose a new federal cause of action, never alleges an
    existing federal common law claim, and only brings claims originating under Maryland
    law, the district court never had subject-matter jurisdiction under the well-pleaded
    17
    complaint rule. See Columbia Gas Transmission v. Singh, 
    707 F.3d 583
    , 588–89 (6th Cir.
    2013) (holding that a federal district court did not possess subject-matter jurisdiction via
    federal common law when a plaintiff did not “clearly seek recovery under federal law” and
    merely brought a “state-law claim with a federal ingredient”). Although we discern no
    federal common law claim from Baltimore’s Complaint, we nevertheless consider whether
    the creation of a federal rule of decision is justified and if a pre-existing federal rule of
    decision already applies because of Defendants’ unusual arguments. 3 See O’Melveny &
    Myers v. Fed. Deposit Ins. Corp., 
    512 U.S. 79
    , 87 (1994).
    2.
    We begin with a well-known principle: “There is no federal general common law.”
    Erie R. Co. v. Tompkins, 
    304 U.S. 64
    , 78 (1938). In decision after decision, the Supreme
    Court has reiterated that federal common law does not exist wholesale. See Rodriguez v.
    Fed. Deposit Ins. Corp., 
    140 S. Ct. 713
    , 717 (2020) (“As this Court has put it, there is ‘no
    federal general common law.’” (quoting Erie, 
    304 U.S. at 78
    )); Hernandez v. Mesa, 
    140 S. Ct. 735
    , 742 (2020) (“[F]ederal courts today cannot fashion new claims in the way that
    they could before 1938.” (citation omitted)); Alexander v. Sandoval, 
    532 U.S. 275
    , 287
    (2001) (“Raising up causes of action where a statute has not created them may be a proper
    3
    We use the term “federal rule of decision” synonymously with “federal common law.”
    See Baker, Watts & Co. v. Miles & Stockbridge, 
    876 F.2d 1101
    , 1106 (4th Cir. 1989); see
    also McGurl v. Trucking Emps. of N. Jersey Welfare Fund, Inc., 
    124 F.3d 471
    , 480 (3d Cir.
    1997).
    18
    function for common-law courts, but not for federal tribunals.” (citation omitted)). But
    despite that understanding, federal common law still exists in narrow areas involving: (1)
    “the rights and obligations of the United States”; (2) “interstate and international disputes
    implicating the conflicting rights of States or our relations with foreign nations”; and (3)
    “admiralty cases.” Tex. Indus., Inc. v. Radcliff Materials, Inc., 
    451 U.S. 630
    , 641 (1981)
    (citations omitted); see also Rodriguez, 140 S. Ct. at 717 (noting that federal common law
    exists in “admiralty disputes and certain controversies between States”); Atherton v. Fed.
    Deposit Ins. Corp., 
    519 U.S. 213
    , 215–16, 225–26 (1997) (collecting cases where the Court
    has created federal common law and ultimately declining to fashion a general standard of
    care for officers and directors of federally insured institutions).
    Federal courts should be reluctant to displace state law through federal common law
    because displacement is typically a legislative decision for Congress. Atherton, 
    519 U.S. 218
    . Regardless, before a federal court can promulgate a federal rule of decision, a dispute
    must satisfy two strict conditions: (1) there must be “uniquely federal interests” at play,
    and (2) a party must show “a ‘significant conflict’ . . . between an identifiable ‘federal
    policy or interest and the [operation] of state law . . . or the application of state law would
    ‘frustrate specific objectives’ of federal legislation.” Boyle v. United Techs. Corp., 
    487 U.S. 500
    , 504, 507 (1988) (second alteration in original) (citations omitted); see also
    Rodriguez, 140 S. Ct. at 717–18 (declining to find a federal interest in how a consolidated
    corporate tax refund is distributed among corporate group members); Atherton, 
    519 U.S. at
    219–26 (finding no “significant conflict with, or threat to, a federal interest” after
    comparing the federal interests to state laws addressing corporate governance);
    19
    O’Melveny, 
    512 U.S. at 88
     (refusing to create a federal rule of decision when a party
    “identified no significant conflict with an identifiable federal policy or interest” and there
    was no federal interest in “uniformity”); Radcliff Materials, 
    451 U.S. at 642
     (rejecting a
    federal interest in creating a federal common law right to contribution). The showing of a
    “[significant] conflict” is normally a “precondition” to creating federal common law.
    Atherton, 
    519 U.S. at 218
     (quoting O’Melveny, 
    512 U.S. at 87
    ); see also Kamen v. Kemper
    Fin. Servs., Inc., 
    500 U.S. 90
    , 98 (1991); United States v. Kimbell Foods, Inc., 
    440 U.S. 715
    , 728 (1979).
    Generally, if these requirements for expanding federal common law are satisfied,
    then a federal district court possesses original jurisdiction over a well-pled federal common
    law claim under § 1331, making removal jurisdiction proper. Nat’l Farmers Union Ins.
    Cos. v. Crow Tribe of Indians, 
    471 U.S. 845
    , 850 (1985) (“It is well settled that [§ 1331’s]
    grant of ‘jurisdiction will support claims founded upon federal common law as well as
    those of a statutory origin.’” (quoting Illinois v. City of Milwaukee, 
    406 U.S. 91
    , 100
    (1972))).
    3.
    At the outset, although Baltimore argued that Defendants failed to show a
    “significant conflict” with any federal interest, we note that neither Defendants nor the
    district court truly grappled with the federal common law inquiry using the cited precedents
    20
    from the Supreme Court. 4 Compare Baltimore’s Resp. Br. 27 n.4, and Baltimore’s Suppl.
    Br. 7–9, with BP P.L.C., 388 F. Supp. 3d at 554–58, and Defs.’ Opening Br. 19–30, and
    Defs.’ Suppl. Br. 12–13. Other than passively referencing Boyle and Radcliff Materials,
    Defendants and the district court never mentioned Rodriguez, Atherton, or O’Melveny.
    Instead, they immediately proceeded to the Court’s authorities dealing with global
    warming and interstate pollution. Given the novelty of Baltimore’s Complaint about fossil-
    fuel products and the Court’s precedents addressing federal common law for interstate and
    greenhouse-gas pollution, see infra Part IV.A.4, we deem it prudent to first address whether
    it is even appropriate to create federal common law for the issues raised in Baltimore’s
    Complaint. See Martinson v. Kinney Shoe Corp., 
    104 F.3d 683
    , 686 (4th Cir. 1997) (noting
    a district court’s error and explaining “we can affirm if its decision was correct for any
    other reason” (citation omitted)); AFA Distrib. Co., Inc. v. Pearl Brewing Co., 
    470 F.2d 1210
    , 1211 (4th Cir. 1973) (vacating a district court’s decision interpreting a statute but
    affirming the dismissal of a complaint for “other reasons”). We do not believe that it is.
    Defendants identify three “uniquely federal interests” at play: (1) the control of
    interstate pollution; (2) energy independence; and (3) multilateral treaties. Defs.’ Opening
    Br. 15. Assuming these qualify as “uniquely federal interests,” Defendants’ request for
    federal common law still fails because they do not satisfy the necessary “precondition” of
    4
    Baltimore’s Motion to Remand identified that a significant conflict needed to be shown
    for the district court to create federal common law. See Baltimore’s Motion to Remand at
    17, Mayor & City Council of Balt. v. BP P.L.C., 
    388 F. Supp. 3d 538
     (D. Md. 2019) (No.
    1:18-cv-02357-ELH), ECF No. 111-1.
    21
    creating federal common law—the recognition of a significant conflict between a federal
    interest and state law’s application. Atherton, 
    519 U.S. at 218
     (quoting O’Melveny, 
    519 U.S. at 87
    ). Defendants, who bear the removal burden, never establish a significant conflict
    between Baltimore’s state-law claims—which purport to impose liability on Defendants
    for their marketing and use of their fossil-fuel products—and any federal interests within
    either their Notice of Removal or Opening Brief.           See J.A. 12–14 (explaining, in
    Defendants’ Notice of Removal, that Baltimore’s claims only “implicate inherently
    national and international interests” or “implicate[] inherently federal concerns” without
    identifying any conflict); Defs.’ Opening Br. 19–30 (acknowledging the Supreme Court’s
    significant-conflict requirement but failing to identify a significant conflict). And in both
    of their submitted Replies, Defendants do not even use the word “conflict.” See Defs.’
    Reply 8–12; Defs.’ Suppl. Reply 2–8. Under our precedents, Defendants’ failure to argue
    a “significant conflict” between Baltimore’s causes of action and its identified federal
    interests constitutes a waiver. See Grayson O Co. v. Agadir Int’l LLC, 
    856 F.3d 307
    , 316
    (4th Cir. 2017) (“A party waives an argument by failing to present it in its opening
    brief . . . .” (citation omitted)); United States v. Caldwell, 
    7 F.4th 191
    , 212 n.16 (4th Cir.
    2021) (“Any other arguments raised for the first time in [a] Reply Brief, however, we deem
    waived.” (citation omitted)). But Defendants’ neglect is more than just a waiver of an
    argument, it substantively precludes the creation of federal common law. As the Supreme
    Court put it, failing to identify a significant conflict when requesting a court to create
    federal common law is “fatal” to a party’s position. See O’Melveny, 
    512 U.S. at 88
     (“What
    is fatal to respondent’s position in the present case is that it has identified no significant
    22
    conflict with an identifiable federal policy or interest.”). Given these failures, we see no
    reason to fashion any federal common law for Defendants.
    From what we can discern, Defendants seem to rely upon City of New York v.
    Chevron Corp., 
    993 F.3d 81
    , 92 (2d Cir. 2021), to now suggest that Baltimore’s claims
    present a conflict between the rights of States and the federal government’s international
    relations. 5 See Defs.’ Suppl. Br. 11. In City of New York, the Second Circuit affirmed the
    dismissal of a climate-change suit brought by New York City, under Federal Rule of Civil
    Procedure 12(b)(6), after characterizing the complaint as seeking liability for “global
    greenhouse gas emissions” and “the effects of emissions made around the globe over the
    past several hundred years.” 993 F.3d at 89, 91–92, 103. City of New York does not pertain
    to the issues before us.
    First and foremost, City of New York was in a completely different procedural
    posture. Id. at 93–94. As the decision itself concedes, the court was not required to
    consider a “heightened standard unique to the removability inquiry” because New York
    City initially filed suit in federal court as opposed to state court. Id. at 94. Indeed, the
    Second Circuit confined itself to Rule 12(b)(6) and never addressed its own subject-matter
    jurisdiction. Id. at 89. The suit before us was initiated in state court, so we are bound by
    the well-pleaded complaint rule or “heightened standard” that did not apply in City of New
    5
    Because City of New York is included in Defendants’ Supplemental Brief and Reply, and
    since that decision was decided while the parties were litigating in the Supreme Court, we
    exercise our discretion to evaluate any holding that Defendants might be relying upon from
    City of New York. Caldwell, 7 F.4th at 212 n.16; see also O’Melveny, 512 at 88
    (considering the “closest” that a party “[came] to identifying a specific, concrete federal
    policy or interest that [was] compromised by California law”).
    23
    York. Id. at 94. And under the well-pleaded complaint rule, we find Baltimore’s suit
    centers on Defendants’ fossil-fuel products and misinformation campaign, not any federal
    common law. See J.A. 150–71 (setting out allegations about Defendants’ fossil-fuel
    products). Second, City of New York suffers from the same legal flaw as Defendants’
    arguments: It fails to explain a significant conflict between the state-law claims before it
    and the federal interests at stake before arriving at its conclusions. See id. at 90–93. For
    instance, after recognizing federalism and the need for a uniform rule of decision as federal
    interests, City of New York confusingly concludes that federal common law is “most needed
    in this area” because New York’s state-law claims touch upon the federal government’s
    relations with foreign nations. 6 Id. at 91–92. But it never details what those foreign
    relations are and how they conflict with New York’s state-law claims. See id. at 92. The
    same is true when City of New York declares that state law would “upset[] the careful
    balance” between global warming’s prevention and energy production, economic growth,
    foreign policy, and national security. Id. at 93. Besides referencing statutes acknowledging
    policy goals, the decision does not mention any obligatory statutes or regulations
    explaining the specifics of energy production, economic growth, foreign policy, or national
    security, and how New York law conflicts therewith. See id. It also does not detail how
    those statutory goals conflict with New York law. See id. City of New York essentially
    evades the careful analysis that the Supreme Court requires during a significant-conflict
    6
    We note that uniformity—in and of itself—is not always a federal interest, and City of
    New York discounts contrary precedent. See Empire Healthchoice Assurance, Inc. v.
    McVeigh, 
    547 U.S. 677
    , 691 (2006); Atherton, 
    519 U.S. at 220
    ; O’Melveny, 
    512 U.S. at 88
    .
    24
    analysis. Cf. Atherton, 
    519 U.S. at
    219–26 (declining to find a significant conflict between
    a federal policy and state-law standards of care after thoroughly examining uniformity,
    history, the internal-affairs doctrine of corporate governance, agency opinions and
    statements, and whether the federal government’s interest was being pursued); Boyle, 
    487 U.S. at
    511–12 (finding, in the context of government procurement, that a federal statutory
    provision demonstrated “the potential for, and suggest[ed] the outlines of,” a significant
    conflict between federal interests and state law when the federal provision implied that the
    “appropriate design for military equipment . . . [was] assuredly a discretionary function”).
    It is for these two critical reasons that we cannot follow City of New York and find federal
    jurisdiction at this juncture.
    In short, we decline to create a federal rule of decision that would apply to
    Baltimore’s claims since Defendants do not point to any significant conflict existing
    between Maryland law and their purported federal interests, which is a complete abdication
    of their removal burden. Prince, 848 F.3d at 176. Setting aside Defendants’ misstep, even
    if they provided us with a significant conflict between Maryland law and a federal interest
    that would justify a new federal rule of decision, the well-pleaded complaint rule would
    still forbid the removal of Baltimore’s Complaint because it pleads no express invocation
    of federal common law. Pinney, 
    402 F.3d at 442
    .
    4.
    Rather than grappling with the threshold inquiry above, Defendants invoke the
    Supreme Court’s older authorities that once (or possibly) recognized federal common law
    25
    in the context of interstate pollution and greenhouse-gas emissions. Defendants present a
    perplexing argument that Baltimore’s claims must be resolved by federal common law
    because it is the source of the underlying claims. 7 Defs.’ Opening Br. 16–19; Defs.’ Suppl.
    Br. 17–18. Baltimore responds that any federal common law in this area is nonexistent
    because the CAA statutorily displaced federal common law claims. Baltimore’s Resp. Br.
    24–28. We cannot conclude that any federal common law controls Baltimore’s state-law
    claims because federal common law in this area ceases to exist due to statutory
    displacement, Baltimore has not invoked the federal statute displacing federal common
    law, and, as we later find, the CAA does not completely preempt Baltimore’s claims.
    We begin with the precedents available to us. In 1972, the Supreme Court famously
    stated that “[w]hen we deal with air and water in their ambient or interstate aspects, there
    is a federal common law . . . .” City of Milwaukee, 
    406 U.S. at 103
    . Employing federal
    common law, City of Milwaukee specifically recognized public nuisance claims for
    disputes involving interstate and navigable waters. 
    Id.
     at 103–04. The Court approved of
    a public nuisance claim for Illinois when it sued municipalities and public sewerage
    7
    Defendants rely upon United States v. Standard Oil Co. of California, 
    332 U.S. 301
    (1947), arguing that we must first determine the source of law for Baltimore’s claims.
    Standard Oil speaks to the threshold question of whether to even create a federal common
    law claim: “And the answer to be given necessarily is dependent upon a variety of
    considerations always relevant to the nature of the specific governmental interests and to
    the effects upon them of applying state law.” 
    Id. at 310
     (emphasis added). And as we have
    decided, Defendants do not meaningfully grapple with the significant-conflict inquiry to
    invoke the governance of federal common law. See supra Part IV.A.3. In any event,
    Standard Oil does not aid Defendants. The decision did not turn on federal-question
    jurisdiction, and the Court declined the opportunity to create a federal cause of action
    sounding in indemnity for the federal government. 
    332 U.S. at
    310–17.
    26
    commissions located within Wisconsin. 
    Id.
     at 93–94. Unlike the case here, private
    defendants were not being sued when the Court initially recognized public nuisance as a
    federal common law claim. Nine years after City of Milwaukee, Congress passed the
    Federal Water Pollution Control Act of 1942 (FWPCA, Clean Water Act, or CWA), and
    the Court then held that the FWPCA displaced the federal common law claim of public
    nuisance it had previously recognized for water pollution. City of Milwaukee v. Illinois,
    451 U.S 304, 312–20 (1981); see also Middlesex Cnty. Sewerage Auth. v. Nat’l Sea
    Clammers Ass’n, 
    453 U.S. 1
    , 21–22 (1981) (noting that the FWPCA “entirely preempted”
    the federal common law of nuisance for water pollution involving ocean waters). These
    issues were not grappled with again until decades later.
    In American Electric Power Co., Inc. v. Connecticut, 
    564 U.S. 410
     (2011), the Court
    considered whether a group of plaintiffs, including eight States, New York City, and three
    private land trusts, “[could] invoke the federal common law of nuisance to abate out-of-
    state pollution” and impose liability on five electric companies for global warming. 
    Id. at 418, 422
    . Recognizing that its precedents had once approved of federal common law for
    suits “brought by one State to abate pollution emanating from another State,” the Court
    emphasized that federal courts should not create federal common law simply because a
    subject is amenable to governance under federal law, especially when there is no
    “demonstrated need for a federal rule of decision.” 
    Id.
     at 421–22 (emphasis added)
    (collecting cases). And it also noted that it had not yet decided whether a political
    subdivision, like Baltimore here, could even invoke federal common law to abate out-of-
    state pollution. 
    Id. at 422
    . While the Court expressed uncertainty about the existence of
    27
    federal common law for the plaintiffs, it ultimately left this “academic question” for
    another day. 
    Id. at 423
    . In the alternative, the Court found that any “federal common-law
    claim for curtailment of greenhouse gas emissions because of their contribution to global
    warming” was “displaced by the federal legislation authorizing [the Environmental
    Protection Agency] to regulate carbon-dioxide emissions.” 
    Id.
     The federal legislation
    displacing the federal common law at issue was the CAA. See 
    id. at 424
     (“We hold that
    the Clean Air Act and the EPA actions it authorizes displace any federal common-law right
    to seek abatement of carbon-dioxide emissions from fossil-fuel fired powerplants.”).
    There are a few things we learn from these cases that the parties rely upon. First,
    although the terms have been used interchangeably by federal courts, there is a significant
    distinction between the statutory displacement of federal common law and the ordinary
    preemption of a state law. 8 City of Milwaukee, 
    451 U.S. at
    316–17; see also Merrick v.
    Diageo Americas Supply, Inc., 
    805 F.3d 685
    , 693–94 (6th Cir. 2015); United States v. Am.
    Com. Lines, L.L.C., 
    759 F.3d 420
    , 422 n.1 (5th Cir. 2014) . When a federal statute displaces
    federal common law, the federal common law ceases to exist. See City of Milwaukee, 
    451 U.S. at 317, 332
     (concluding that “no federal common-law remedy was available” when it
    was statutorily displaced by congressional amendments to the FWPCA); Nat’l Sea
    8
    Defendants cannot argue that federal common law completely preempts Baltimore’s
    claims because the Supreme Court has only applied complete preemption in the context of
    federal statutes, not federal common law. See Metro. Life, 
    481 U.S. at
    63–64 (“Congress
    may so completely pre-empt a particular area that any civil complaint raising this select
    group of claims is necessarily federal in character.” (emphasis added)). There cannot be a
    congressional intent to completely preempt via federal common law since it is created by
    federal judges and not Congress. See 
    id.
    28
    Clammers, 
    453 U.S. at
    21–22 (noting that federal common law was “entirely preempted”
    by the FWPCA and dismissing a federal common law claim for having no “underlying
    legal basis”); see also Native Vill. of Kivalina v. ExxonMobil Corp., 
    696 F.3d 849
    , 857 (9th
    Cir. 2012) (“Judicial power can afford no remedy unless a right that is subject to that power
    is present. If a federal common law cause of action has been extinguished by Congressional
    displacement, it would be incongruous to allow it to be revived in another form.”). But
    when a state law is ordinarily preempted by a federal statute, the federal statute supplants
    and supersedes the state law without extinguishing it. See Am. Elec. Power, 
    564 U.S. at 429
    ; Am. Com. Lines, 759 F.3d at 422 n.1; S. Blasting Servs., Inc. v. Wilkes Cnty., 
    288 F.3d 584
    , 590 (4th Cir. 2002). Preemption requires a “clear and manifest purpose” from
    Congress, while displacement does not. City of Milwaukee, 
    451 U.S. at
    316–17. Secondly,
    federal common law claims of public nuisance, at least for water and air pollution, have
    been displaced by the CWA and CAA. See Am. Elec. Power, 
    564 U.S. at 423
    ; Nat’l Sea
    Clammers, 
    453 U.S. at
    21–22; City of Milwaukee, 451 U.S at 312–20; see also City of
    Oakland v. BP PLC, 
    969 F.3d 895
    , 906 (9th Cir. 2020). This all means something simple.
    Public nuisance claims involving interstate pollution, including issues about greenhouse-
    gas emissions, are nonexistent under federal common law because they are statutorily
    displaced. In other words, a federal statute is the legal source of those claims, and a federal
    common law remedy is unavailable. City of Milwaukee, 
    451 U.S. at 332
    .
    Defendants seek removal through an extraordinary means in their attempt to use
    federal common law. Essentially, Defendants believe that removal is proper based on
    federal common law even when the federal common law claim has been deemed displaced,
    29
    extinguished, and rendered null by the Supreme Court. We believe that position defies
    logic. The Court has previously emphasized that “federal courts are without power to
    entertain claims otherwise within their jurisdiction if they are so attenuated and
    unsubstantial as to be absolutely devoid of merit; wholly insubstantial; obviously frivolous;
    plainly unsubstantial; or no longer open to discussion.” Hagans v. Lavine, 
    415 U.S. 528
    ,
    536–37 (1974) (citations omitted) (cleaned up). Again, Defendants repeatedly characterize
    Baltimore’s claims as interstate-pollution claims. But due to statutory displacement,
    federal common law claims concerning interstate pollution and the regulation of
    greenhouse-gas emissions are now obsolete. See Am. Elec. Power, 
    564 U.S. at 423
    ; Nat’l
    Sea Clammers, 
    453 U.S. at
    21–22; City of Milwaukee, 451 U.S at 312–20. Contrary to
    Defendants’ insistence, it is “no longer open to discussion” that federal common law claims
    even exist to govern Baltimore’s claims. Hagans, 
    415 U.S. at 537
    ; see also City of
    Oakland, 969 F.3d at 906 (noting that federal common law claims for public nuisance are
    displaced by the CAA in a similar suit). Since those claims are defunct, and invoking them
    is “devoid of merit,” a federal court cannot exercise federal-question jurisdiction on that
    basis. See Dixon v. Coburg Dairy, Inc., 
    369 F.3d 811
    , 817 n.5 (4th Cir. 2004). Tellingly,
    Defendants cite no authority justifying removal for nonexistent claims that have been
    displaced by federal statutes. If anything, case law suggests that the displacement of
    federal common law deprives federal courts of jurisdiction. See Native Village of Kivalina,
    696 F.3d at 855, 858 (affirming a district court’s dismissal for lack of subject-matter
    jurisdiction because the “federal common law addressing domestic greenhouse gas
    emissions has been displaced by Congressional action”). Thus, we will not provide
    30
    Defendants with the unprecedented opportunity to obtain removal based on a nonexistent
    theory of federal common law when its viability is “no longer open to discussion” as a
    means of federal relief. Hagans, 
    415 U.S. at 537
    ; see also Fitz Gerald v. Thompson, 
    222 U.S. 555
    , 557 (1912) (dismissing a writ of error when there was no federal jurisdiction
    because “[t]he right to remove from the state court which was asserted had no legal
    foundation” and was “manifestly frivolous and devoid of merit”).
    In sum, we do not accept the governance of federal common law when the CWA
    and CAA have statutorily displaced any federal common law that previously existed, and
    Baltimore’s Complaint does not desire relief under either of those federal statutes. See
    Pinney, 
    402 F.3d at 442
    . If we found federal common law as a valid removal basis in this
    case, we would first undercut the well-pleaded complaint rule by ignoring Baltimore’s
    pleaded claims and then undermine complete preemption by disregarding what that
    separate inquiry later requires of us. See Bd. of Cnty. Comm’rs of Boulder Cnty. v. Suncor
    Energy (U.S.A.) Inc., 
    25 F.4th 1238
    , 1257–65 (10th Cir. 2022) (rejecting Defendants’
    invocation of federal common law as a basis for removal and considering complete
    preemption under the CAA). We decline to endorse those outcomes.
    5.
    And finally, Defendants insist that we are bound to follow Caudill v. Blue Cross &
    Blue Shield of North Carolina, 
    999 F.2d 74
     (4th Cir. 1993), and North Carolina
    Department of Administration v. Alcoa Power Generating, Inc., 
    853 F.3d 140
     (4th Cir.
    31
    2017). Both of those decisions are readily distinguishable from the circumstances before
    us.
    In Caudill, a federal employee brought a breach-of-contract action against her
    insurer concerning her coverage under a contract between the insurer and federal
    government. 
    999 F.2d at
    76–77. We held that federal common law governed the contract,
    and removal was thus proper under federal-question jurisdiction. 
    Id.
     at 77–79. But the
    Supreme Court rejected Caudill’s use of federal common law as a basis for federal-question
    jurisdiction in Empire Healthchoice Assurance, Inc. v. McVeigh, 
    547 U.S. 677
    , 689–93
    (2006), when it concluded there was no showing of a conflict between a federal interest
    and state law that mandated the formulation of federal common law. In light of Empire,
    Caudill’s holding about the existence of federal common law for interpreting federal
    contracts involving health insurance is now abrogated. Compare 
    id.,
     with Caudill, 
    999 F.2d at
    76–77. We thus decline to follow reasoning that is outright overturned.
    In Alcoa Power, North Carolina sought a declaration against a power company
    concerning its ownership of a forty-five-mile segment of the Yadkin River. 853 F.3d at
    143–45. According to North Carolina, the power company acquired the segment by deed
    and, on the segment, constructed four hydroelectric dams to power its smelting plant. Id.
    North Carolina maintained that the power company was only using the riverbed segment
    of the Yadkin River with its permission and that permission was withdrawn after the
    company decided to permanently close its smelting plant and layoff its employees. Id.
    North Carolina originally sought its declaration in state court as a state-law claim to quiet
    title, but the power company removed the suit to federal court, contending that the issue of
    32
    navigability for title was a federal question. Id. at 145–46. On appeal, we held that the
    district court possessed federal-question jurisdiction, warranting removal, because state
    ownership of the beds of navigable waters relies on the Constitution. Id. at 147–50. When
    the Supreme Court emphatically declared that “questions of navigability for determining
    state riverbed title are governed by federal law,” we reasoned that the Court was
    “reaffirming the federal nature of the issue of navigability for title” and recognizing its
    precedents from over 150 years. Id. at 148 (quoting PPL Mont., LLC v. Montana, 
    565 U.S. 576
    , 591 (2012)). Alcoa Power is inapplicable here. Unlike Alcoa Power, Defendants do
    not rely on any constitutional provision suggesting federal law applies to or governs
    Baltimore’s claims.     And particularly given American Electric Power’s holding,
    Defendants certainly cannot point this Court to over 150 years of precedent recognizing
    the federal character of Baltimore’s claims. Even more, Baltimore’s Complaint is not
    concerned with a declaration of title to any navigable water owned or occupied by
    Defendants. Alcoa Power provides little in the way of principle that governs here.
    6.
    Compared to state common law, federal common law is extremely limited. Radcliff
    Materials, 
    451 U.S. at 640
     (observing that areas involving federal common law are “few
    and restricted” (quoting Wheeldin v. Wheeler, 
    373 U.S. 647
    , 651 (1963))). State law has
    traditionally governed the realm of products liability and continues to do so here. See Pac.
    Atl. Trading Co., Inc. v. M/V Main Express, 
    758 F.2d 1325
    , 1130 n.1 (9th Cir. 1985); In re
    “Agent Orange” Prod. Liab. Litig., 
    635 F.2d 987
    , 991 n.9, 993–94 (2d Cir. 1980).
    33
    Defendants have failed to show that federal common law truly controls this dispute
    involving their fossil-fuel products and misinformation campaign. At the second oral
    argument in this case, that failure became even more evident when Defendants did not even
    identify what federal common law claim is at Baltimore’s disposal and what their own
    defense to it would be. At most, Defendants present us with an ordinary preemption
    argument that does not warrant removal. See Caterpillar, 
    482 U.S. at 393
    . Regardless of
    how they frame their invocation, we decline to permit Defendants to rely upon federal
    common law as a theory for removal and affirm the district court’s sound rejection thereof.
    B.
    Defendants next seek to establish federal jurisdiction under Grable and its progeny,
    arguing “[s]everal aspects of [Baltimore]’s claims” present substantial and disputed federal
    issues. Defs.’ Opening Br. 33. Here, Defendants argue those federal issues include
    national security, foreign affairs, energy policy, and environmental regulation. Baltimore,
    however, posits that Defendants “dramatically overread[]” Grable’s scope. Baltimore’s
    Resp. Br. 33. We agree with Baltimore and find Defendants’ invocation of Grable
    jurisdiction and the foreign-affairs doctrine fails to pass legal muster.
    1.
    There is a “‘slim category’ of cases . . . in which state law supplies the cause of
    action but federal courts have jurisdiction under § 1331 because ‘the plaintiff’s right to
    relief necessarily depends on resolution of a substantial question of federal law.’” Burrell,
    34
    918 F.3d at 380 (citations omitted). Federal courts must be “cautious” in exercising this
    form of jurisdiction because it lies at the “outer reaches of § 1331.” Id. (quoting Merrell
    Dow Pharms. Inc. v. Thompson, 
    478 U.S. 804
    , 810 (1986)). The Supreme Court has
    emphasized that the “mere presence of a federal issue in a state cause of action does not
    automatically confer federal-question jurisdiction.”       Merrell Dow, 
    478 U.S. at 813
    (emphasis added) (citations omitted).
    To ensure complaints alleging only state-law claims are not in federal court when
    they merely implicate federal issues, the Supreme Court established a four-prong test for
    determining the existence of federal-question jurisdiction. See Grable, 
    545 U.S. at 314
    .
    Federal-question jurisdiction exists over a state-law claim if a federal issue is: “(1)
    necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in
    federal court without disrupting the federal-state balance approved by Congress.” Gunn v.
    Minton, 
    568 U.S. 251
    , 258 (2013) (emphasis added). A federal question is “necessarily
    raised” under § 1331 “only if it is a ‘necessary element of one of the well-pleaded state
    claims.’” Burrell, 918 F.3d at 381 (quoting Franchise Tax Bd., 
    463 U.S. at 13
    ). A federal
    issue is “actually disputed” when the parties disagree about the effect of federal law. See
    Gunn, 
    568 U.S. at 259
    . The substantiality question “looks . . . to the importance of the
    issue to the federal system as a whole.” 
    Id. at 260
    . And, to strike a balance between federal
    and state judicial responsibilities, a federal court must ensure that it gives leeway to States
    in areas where they possess “special responsibilit[ies].” 
    Id. at 264
     (quoting Ohralik v. Ohio
    State Bar Ass’n, 
    436 U.S. 447
    , 460 (1978)).
    35
    2.
    Looking at the face of Baltimore’s Complaint, Grable jurisdiction cannot lie
    because a federal issue is not “necessarily raised.” Id. at 258. Grable jurisdiction thus fails
    on the very first prong. 9
    Again, a federal issue is “necessarily raised” only when a federal question is a
    “necessary element” of one of the pleaded state-law claims within a plaintiff’s complaint.
    Burrell, 918 F.3d at 381 (quoting Franchise Tax Bd., 
    463 U.S. at 13
    ). The Court’s
    precedents indicate when this requirement is satisfied. For instance, in Grable, the
    Supreme Court held that a quiet-title action under Michigan law “necessarily raised”
    federal issues because the plaintiff premised its state-law claim on the Internal Revenue
    Service’s failure to comply with notification requirements established by federal law. 
    545 U.S. at 310
    , 314–15. Similarly, the Gunn Court held that a legal-malpractice claim under
    Texas law “necessarily require[d] application of [federal] patent law to the facts of [the]
    case” since the state-law claim required a showing of prevailing in a federal patent
    infringement action. 
    568 U.S. at 259
    .
    We have adhered to the Court’s guidance by looking for federal ingredients that are
    “necessary” for the state-law claim’s success. For example, in Pinney, we examined seven
    state-law claims, all under the laws of different States, to conclude that federal law was not
    a “necessary element” for any of the state-law claims and they only required the “resolution
    9
    Because a federal issue is not “necessarily raised” by Baltimore’s Complaint, we need
    not address the remaining factors of Grable jurisdiction. See Burrell, 918 F.3d at 384, 386.
    36
    of questions of state law.” 
    402 F.3d at
    442–46. Most recently, in West Virginia State
    University Board of Governors v. Dow Chemical Co., a historically black college sued a
    chemical company for contaminating the groundwater beneath the land it owned. 
    23 F.4th 288
    , 292–94 (4th Cir. 2022). The university’s claims were brought exclusively under West
    Virginia common law. Id. at 296. We held that federal issues were not “necessarily raised”
    or even “substantially raised” because the college did not challenge a “cleanup” order under
    the Comprehensive Environmental Response, Compensation, and Liability Act, 
    42 U.S.C. § 9613
    (b), (h), and its state-law claims were not preempted by the Resource Conservation
    and Recovery Act’s savings clause, 
    id.
     § 6972.          23 F.4th at 307–12.     These cases
    demonstrate that state-law claims must “hinge on the determination of a federal issue” to
    fulfill Grable’s first prong. Vlaming v. W. Point Sch. Bd., 
    10 F.4th 300
    , 306 (4th Cir. 2021).
    Defendants never identify what federal question is a “necessary element” for any of
    Baltimore’s state-law claims. 10 See Defs.’ Opening Br. 33–40. All of Baltimore’s claims
    are brought under Maryland law, and none of them invoke federal law as a necessary
    requirement for imposing liability upon Defendants. See J.A. 149–72. Thus, Defendants’
    liability does not turn or “hinge” upon interpreting federal law. Cf. Bauer v. Elrich, 
    8 F.4th 291
    , 297 (4h Cir. 2021) (holding that plaintiffs “necessarily raised” a federal issue because
    they sought to enforce a federal statute and did not advance a state-law right). Failing to
    10
    We note that City of Oakland considered federal common law in the context of Grable
    jurisdiction in a similar suit involving Defendants. 969 F.3d at 906. In the case before us,
    Defendants have not asked us to analyze federal common law under Grable, so we deviate
    from City of Oakland in this respect. See Defs.’ Opening Br. 33–40.
    37
    carry their removal burden, Defendants provide us with no federal question Baltimore has
    alleged that is “essential to resolving” its claims under Maryland law. Burrell, 918 F.3d at
    383 (citation omitted).
    Read most generously, Defendants’ Opening Brief maintains that federal agencies
    typically weigh the costs and benefits of fossil-fuel extraction, so Baltimore’s nuisance
    claims “invite a state court factfinder [to] adjudicate the reasonableness of . . . federal
    agencies’ balancing of harms and benefits.” Defs.’ Opening Br. 34–35. But this argument
    first rests on a misunderstanding of Baltimore’s Complaint.               Baltimore essentially
    challenges the efficacy and safety of Defendants’ fossil-fuel products and sales practices
    promoting them. See J.A. 150–71. The Complaint is not solely about the initial act of
    fossil-fuel extraction, nor is it concerned with setting and regulating greenhouse-gas
    emissions. See J.A. 47.
    Defendants’ argument then misapprehends the elements of public and private
    nuisance under Maryland law. “A public nuisance is an injury to the public at large or to
    all persons who come in contact with it,” while “[a] private nuisance is injury to an
    individual or a limited number of individuals only.” Adams v. Comm’rs of Trappe, 
    102 A.2d 830
    , 834 (Md. 1954). Typically, “[a p]rivate nuisance is ‘a nontrespassory invasion
    of another’s interest in the private use and enjoyment of land.’” Exxon Mobil Corp. v.
    Albright, 
    71 A.3d 30
    , 94 (Md. 2013) (quoting Wietzke v. Chesapeake Conf. Ass’n, 
    26 A.3d 931
    , 943 (Md. 2011)). The distinction between a private and public nuisance turns on
    whether the impacted rights are “confined to private ownership or are cast broadly across
    the general public . . . .” Wietzke, 26 A.3d at 943 (citation omitted).
    38
    Adopting the Second Restatement of Torts, Maryland courts require a public
    nuisance to involve an “unreasonable interference” with the public’s rights. Tadjer v.
    Montgomery Cnty., 
    479 A.2d 1321
    , 1327 (Md. 1984) (quoting Restatement (Second) of
    Torts § 821(B) (Am. L. Inst. 1979)).          Circumstances showing an “unreasonable
    interference” may include: (1) “[w]hether the conduct involves a significant interference
    with the public health, the public safety, the public peace, the public comfort or the public
    convenience”; (2) “whether the conduct is proscribed by a statute, ordinance or
    administrative regulation”; or (3) “whether the conduct is of a continuing nature or has
    produced a permanent or long-lasting effect, and, as the actor knows or has reason to know,
    has a significant effect upon the public right.” Id. (citation omitted). Claimants can point
    to any or all of those three circumstances when attempting to prove the “unreasonable-
    interference” element of a public nuisance. They can avoid federal law entirely, for
    example, if they show harmful conduct either involving a “significant interference” with
    the public’s safety or producing a “permanent or long-lasting effect.” See id. Neither of
    those avenues require federal law as a “necessary element.”
    It is true that the Second Restatement of Torts indicates that the “unreasonable-
    interference” question may be fulfilled by showing the conduct at issue is proscribed by “a
    statute, ordinance or administrative regulation.” Id. (emphasis added). So claimants may
    invoke a federal law or regulation to show that there is an “unreasonable interference” with
    the public’s rights. But that is discretionary and not a “necessary element.” Without
    resorting to any federal law, Plaintiffs can also utilize a state law or regulation when
    showing an “unreasonable interference” with the public’s rights. Maryland courts agree.
    39
    See Raynor v. Md. Dep’t of Health & Mental Hygiene, 
    676 A.2d 978
    , 990–91 (Md. Ct.
    Spec. App. 1996) (finding a Maryland regulation “[did] no more than prohibit or abate a
    public nuisance” when examining the Takings Clause under the Fifth Amendment); see
    also Comm’rs of Trappe, 102 A.2d at 836–37.
    A private nuisance also requires a claimant to establish an “unreasonable and
    substantial interference” with the use of his or her private property. Exxon Mobil, 71 A.3d
    at 94. Like public nuisances, that element of a private-nuisance claim may also be proven
    by exclusively using state statutes or regulations. 11 See Wietzke, 26 A.3d at 942, 947. Since
    neither public nor private nuisances “necessarily raise” federal law as a “necessary
    element,” we find that federal agencies’ balancing of the harms and benefits of fossil-fuel
    extraction is not “necessary” for proving either claim. See Pinney, 
    402 F.3d at 449
     (“The
    Supreme Court has been quite clear that for removal to be proper under the substantial
    federal question doctrine, a plaintiff’s ability to establish the necessary elements of his state
    law claims must rise or fall on the resolution of a question of federal law.” (citing Merrell
    Dow, 
    478 U.S. at 813
    )); see also Bd. of Cnty. Comm’rs of Boulder Cnty., 25 F.4th at 1266–
    67.
    11
    We agree with Defendants that Maryland law permits a factfinder to balance competing
    property interests for the “unreasonable-interference” question for private nuisances. See
    Wietzke, 26 A.3d at 942–47. However, we disagree that a Maryland factfinder, during its
    context-specific inquiry, would have to “necessarily” consider federal law when balancing
    property interests and deciding if Defendants’ conduct was an “unreasonable-interference.”
    See id. at 944 (“And it is equally true, that the mere lawfulness of the act is not in itself a
    test in all cases, of exemption from liability for [private nuisance].” (quoting Short v. Balt.
    City Passenger Ry. Co., 
    50 Md. 73
    , 81 (1878))); id. at 947 (describing the multiple factors
    to consider for an “unreasonable-interference” determination for private nuisance).
    40
    Defendants also assert that Baltimore’s “promotion claims implicate federal duties
    to disclose . . . .” Defs.’ Opening Br. 37 (emphasis added). We must reject this argument.
    Despite possessing the removal burden, Defendants do not tell us which of Baltimore’s
    causes of action under Maryland law is a “promotion claim.” See id. But even if we assume
    Defendants are referring to Baltimore’s claims involving strict liability for failure to warn,
    negligent failure to warn, and the MCPA, they have not identified how any of those claims
    require federal law as a “necessary element” for their resolution. 12 See id. And we have
    not found any federal law or issue that is raised by the elements of those state-law claims.
    See Pinney, 
    402 F.3d at
    446–49 (finding a federal issue was not “necessarily raised” by
    design-defect claims when federal radiation standards were only “one factor” for
    establishing liability, and liability could still be found even with regulatory compliance);
    see also Carmine v. Poffenbarger, 
    154 F. Supp. 3d 309
    , 312 n.1, 314–17 (E.D. Va. 2015)
    (declining to find federal issues were “necessarily raised” by failure-to-warn and design-
    defect claims because a federal question was not an element of either claim).
    We cannot find that Baltimore’s Complaint “necessarily raises” any question of
    federal law as envisioned by the Supreme Court. It is a far cry from what the Court has
    deemed sufficient to satisfy the “necessarily raised” prong. Cf. Gunn, 
    568 U.S. at 259
    ;
    Grable, 
    545 U.S. at 310
    , 314–15. Accordingly, federal-question jurisdiction does not lie
    since Baltimore’s Complaint is not one of those “slim category” of cases warranting Grable
    12
    Defendants have waived any such arguments since they were not raised in their Opening
    Brief. See Grayson O Co., 856 F.3d at 316.
    41
    jurisdiction. See Bd. of Cnty. Comm’rs of Boulder Cnty., 25 F.4th at 1265–71 (rejecting
    Defendants’ invocation of Grable jurisdiction); City of Oakland, 969 F.3d at 906–07
    (holding Grable jurisdiction was improper because a federal issue was not “necessarily
    raised” by a complaint originally filed in state court against Defendants); Flying Pigs, LLC
    v. RRAJ Franchising, LLC, 
    757 F.3d 177
    , 182–83 (4th Cir. 2014) (finding Grable
    jurisdiction was unwarranted because a federal issue was not “necessarily raised” when a
    claimant never sued under the Lanham Act but brought a state-court proceeding to enforce
    an equitable lien). We thus affirm the district court’s rejection of Grable jurisdiction as a
    basis for removal.
    3.
    Defendants wrongly rely on the foreign-affairs doctrine in the Grable context for
    federal jurisdiction. 13 Stating that “[t]he question of how to address climate change has
    long been and remains the subject of international negotiations[,]” Defendants assert that
    Baltimore wants to “replace . . . international negotiations and congressional and executive
    decisions with Maryland common law and private litigation in state court.” Defs.’ Opening
    13
    It is unclear whether Defendants intend to invoke the foreign-affairs doctrine. See Defs.’
    Opening Br. 38–39. But they seem to appeal to it by citing to American Insurance
    Association v. Garamendi, 
    539 U.S. 396
     (2003). See 
    id.
    42
    Br. 38–39. According to Defendants, Maryland law must yield to the federal government’s
    international policies. We are not persuaded.
    Under our Grable inquiry, there is nothing in Baltimore’s Complaint indicating that
    foreign affairs are “necessarily raised” by its state-law claims. See City of Oakland, 969
    F.3d at 906–07 (concluding Defendants’ argument about foreign policy did not raise a
    substantial question of federal law for Grable jurisdiction). While the Complaint contains
    historical references to international treaties in a brief section, see J.A. 114, 123, there is
    no indication that Baltimore’s state-law claims either rise or fall based on any foreign
    policies, international treaties, or relationships with foreign nations. “The most one can
    say is that a question of [foreign affairs] is lurking in the background . . . .” Gully v. First
    Nat’l Bank, 
    299 U.S. 109
    , 117 (1936).
    In any case, Defendants suggest that the foreign-affairs doctrine preempts
    Baltimore’s Complaint. “Under the foreign[-]affairs doctrine, state laws that intrude on
    this exclusively federal power are [constitutionally] preempted.” Movsesian v. Victoria
    Versicherung AG, 
    670 F.3d 1067
    , 1071 (9th Cir. 2012). This is so because the power to
    conduct international affairs is solely vested with the federal government, not the States.
    See United States v. Pink, 
    315 U.S. 203
    , 233–34 (1942); see also Hines v. Davidowitz, 
    312 U.S. 52
    , 63 (1941) (“The Federal Government . . . is entrusted with full and exclusive
    responsibility for the conduct of affairs with foreign sovereignties.”). The foreign-affairs
    doctrine may constitutionally preempt state laws through conflict preemption or field
    preemption. Movsesian, 670 F.3d at 1071–72. For a state law to give way under conflict
    preemption, there must be a “sufficiently clear conflict” between the state law and an
    43
    express foreign policy. See Am. Ins. Ass’n v. Garamendi, 
    539 U.S. 396
    , 420–24 (2003);
    see also Gingery v. City of Glendale, 
    831 F.3d 1222
    , 1228–29 (9th Cir. 2016). Field
    preemption applies “in the absence of a treaty” and when a state law or policy “disturb[s]
    foreign relations” or if a State attempts to “establish its own foreign policy.” Zschernig v.
    Miller, 
    389 U.S. 429
    , 441 (1968). Field preemption asks whether the state law “has more
    than ‘some incidental or indirect effect in foreign countries[]’ . . . .” 
    Id. at 434
    .
    Taking up conflict preemption, Defendants do not identify any express foreign
    policy from the federal government that conflicts with Baltimore’s state-law claims. See
    Defs.’ Opening Br. 38–39. At best, Defendants reference the Kyoto Protocol, signed in
    1997 by President Clinton but never ratified by the United States Senate.               Nathan
    Richardson, The Rise and Fall of Clean Air Act Climate Policy, 10 Mich. J. Env’t & Admin.
    L. 69, 75 (2020); see also Massachusetts v. Env’t Prot. Agency, 549 U.S 497, 509 (2007).
    At worst, they point us to a slew of remarks from Presidents Ford, Carter, Reagan, H.W.
    Bush, Clinton, W. Bush, Obama, and Trump. See Defs.’ Opening Br. 39 (citing J.A. 265–
    69). In and of themselves, those remarks are not explicit foreign policies that may create
    a conflict. See Garamendi, 
    539 U.S. at 401
    , 413–24 (considering the preemption of
    California’s Holocaust Victim Insurance Relief Act of 1999, 
    Cal. Ins. Code §§ 13800
    –07,
    when the Executive Branch signed agreements with foreign nations). And those statements
    do not establish that Maryland common law, or even the common law of States generally,
    is an obstacle to the federal government’s dealings with foreign nations. See Crosby v.
    Nat’l Foreign Trade Council, 
    530 U.S. 363
    , 366–68, 383–85 (2000) (noting and relying
    on the Executive Branch’s direct remarks about a Massachusetts statute barring the
    44
    purchase of goods from those “doing business with Burma”). Once again, in so much as
    Defendants fail to identify a conflict, the Court cannot find that they have carried their
    removal burden. Prince, 848 F.3d at 176.
    As to field preemption, we do not believe that Baltimore’s claims are precluded on
    this basis either. Defendants have not articulated how Baltimore’s common law claims
    serve as Baltimore’s assertion of its own foreign policy. See Defs.’ Opening Br. 38–39.
    In Zschernig, an Oregon statute permitted escheat 14 when “nonresident alien[s] claim[ed]
    real or personal property” and three conditions were satisfied. 
    389 U.S. at
    430–31. The
    Court held that the Oregon statute unconstitutionally intruded upon the field of foreign
    affairs, reasoning that the statute required state courts to delve into the “actual
    administration of foreign law, . . . credibility of diplomatic statements, and . . . speculation
    [concerning] the fact that some received delivery of funds should ‘not preclude
    wonderment as to how many may have been denied ‘the right to receive’ . . . .” 
    Id. at 435
    (citations omitted). The Court went on to examine how Oregon courts were addressing
    foreign relations, holding that their statute was impacting foreign relations “in a persistent
    and subtle way.” 
    Id.
     at 435–41.
    Despite bearing the removal burden, Defendants have not provided us with even
    one decision from Maryland courts showing how any of Baltimore’s state-law claims entail
    14
    Generally, escheat permits a State to take custody or assume title of abandoned property
    when a person dies without leaving the property to any heirs and that property is located
    within that State. See Delaware v. New York, 
    507 U.S. 490
    , 497 (1993); Texas v. New
    Jersery, 
    379 U.S. 674
    , 675 (1965).
    45
    foreign relations. Even more importantly for field preemption, Defendants have not at all
    explained how common law claims under state law meaningfully “disturb foreign
    relations,” nor have they delineated how Baltimore’s claims are an attempt to “establish its
    own foreign policy.” Id. at 441. Baltimore’s Complaint does not contain any allegations
    that develop foreign policies with other countries, and nor does it undermine the federal
    government in the international arena.      At best, it involves an intersection between
    Maryland law and private, international companies. See Md. Code Ann., Corps. & Ass’ns
    § 7-105 (“By doing intrastate, interstate, or foreign business in this State, a foreign
    corporation assents to the laws of this State.” (emphasis added)). Thus, we find no
    persuasive reason to apply field preemption.
    At bottom, we decline to apply the foreign-affairs doctrine as either a constitutional
    bar to Baltimore’s Complaint or a valid means for removal under Grable jurisdiction. Our
    conclusion neatly aligns with our sister circuits’ approach of applying the foreign-affairs
    doctrine to disputes only with direct impacts on foreign relations. Cf. City of Glendale,
    831 F.3d at 1229–31 (holding the foreign-affairs doctrine does not preclude a local
    government’s expression, in the form of a monument, about foreign affairs); Movsesian,
    670 F.3d at 1070, 1075–77 (concluding the foreign-affairs doctrine applied when a state
    statute permitted state courts to entertain insurance claims of “Armenian Genocide
    victim[s]” against insurers covering persons and property in Europe and Asia between 1875
    and 1923); Deutsch v. Turner Corp., 
    324 F.3d 692
    , 703–04, 708–16 (9th Cir. 2003)
    (applying the foreign-affairs doctrine to a state statute creating a cause of action against
    46
    corporations for employing slave labor during the Second World War because it intruded
    upon the federal government’s power to resolve war claims for committed wrongs).
    C.
    Next is Defendants’ argument that Baltimore’s Complaint is completely preempted
    by the CAA. This argument fails as well.
    As we have already stated, complete preemption requires “the congressional intent
    that state law be entirely displaced . . . be clear in the text of the statute.” Lontz, 
    413 F.3d at
    441 (citing Metro. Life, 
    481 U.S. at
    65–66). The federal statute must show “Congress
    intended it to ‘provide the exclusive cause of action’ for claims of overwhelming national
    interest.” 
    Id.
     (quoting Beneficial Nat’l Bank, 
    539 U.S. at 9, 11
    ). To date, the Supreme
    Court has only applied complete preemption to three federal statutes: (1) §§ 85 and 86 of
    the National Bank Act of 1863; (2) § 502 of the Employee Retirement Income Security Act
    of 1974 (ERISA); and (3) § 301 of the Labor Management Relations Act of 1947 (LMRA).
    See N.J. Carpenters & the Trs. Thereof v. Tishman Constr. Corp. of N.J., 
    760 F.3d 297
    ,
    302 (3d Cir. 2014) (collecting cases); see also Lontz, 
    413 F.3d at 441
     (same). We have
    extended complete preemption to certain state-law claims implicating § 301(a) of the
    Copyright Act and § 10501(b) of the Interstate Commerce Termination Act.                    See
    Rosciszewski v. Arete Assocs., Inc., 
    1 F.3d 225
    , 230–33 (4th Cir. 1993) (section 301(a) of
    the Copyright Act); Skidmore, 1 F.4th at 212–17 (section 10501(b) of the Interstate
    Commerce Termination Act).
    47
    We turn to the history and text of the CAA as required by our complete-preemption
    inquiry. The CAA was enacted in 1963, and Congress declared that its express purpose
    was to “protect the Nation’s air resources so as to promote the public health and welfare
    and the productive capacity of its population . . . .” Clean Air Act, Pub. L. No. 88-206, § 1,
    
    77 Stat. 392
    , 393 (1963) (codified as amended at 
    42 U.S.C. § 7401
    (b)(1)). In 1990,
    Congress further recognized that “air pollution prevention (that is, the reduction or
    elimination, through any measures, of the amount of pollutants produced or created at the
    source) and air pollution control at its source is the primary responsibility of the States and
    local governments . . . .” 15 Clean Air Act Amendments, Pub. L. No. 101-549, § 108, 
    104 Stat. 2399
    , 2468 (1990) (emphasis added) (codified at 
    42 U.S.C. § 7401
    (a)(3)). The CAA
    regulates air pollution from stationary sources, emission standards for moving sources,
    noise pollution, acid raid, and stratospheric ozone protection. 
    42 U.S.C. §§ 7401
    –7515,
    7521–7590, 7641–7642, 7651–7651o, 7671–7671q. It also provides a means for citizen
    suits and outlines a permitting process for emission standards. 
    Id.
     §§ 7604, 7661–7661f.
    The Supreme Court has suggested that the CAA has force under ordinary preemption
    principles and not under complete preemption principles. See Am. Elec. Power Co., 
    564 U.S. at 429
     (“In light of our holding that the Clean Air Act displaces federal common law,
    the availability vel non of a state law depends, inter alia, on the preemptive effect of the
    federal Act.” (citing Int’l Paper Co. v. Ouellette, 
    479 U.S. 481
    , 489, 491, 497 (1987))).
    15
    This language appeared in the CAA when it was first passed, excluding the parenthetical
    addressing the “reduction or elimination” of pollutants. See Clean Air Act § 1, 77 Stat. at
    393.
    48
    First, primarily relying on § 7607(b)(1), Defendants correctly point out that the
    CAA allows parties to challenge various actions, regulations, and standards promulgated
    by   the    Administrator     of     the     Environmental   Protection    Agency     (EPA).
    However, § 7607(b)(1) has nothing to do with lawsuits against private parties as it
    explicitly authorizes a means for judicial review of the EPA’s final actions and rulemaking.
    Baltimore’s Complaint does not ask a court to review the legality of any of the EPA’s
    decisions or regulations. 16 And as we have explained above and more fully below, its state-
    law claims do not involve the regulation of emissions. Baltimore’s causes of action simply
    do not “duplicate[], supplement[], or supplant[]” § 7607(b)(1)’s procedures for obtaining
    judicial review of actions by the EPA. See Aetna Health, 
    542 U.S. at 209
    . Rather than
    establishing   an   exclusive      federal   scheme   through    §   7607(b)(1),    Congress
    intended § 7401(a)(3) to vest state and local governments with the “primary responsibility”
    of controlling and preventing air pollution. State and local governments could not have
    any “primary responsibility” over air pollution if their laws were completely preempted
    and replaced by a federal regime. § 7401(a)(3).
    Second, “[t]he presence of a savings clause counsels against a finding that Congress
    intended to sweep aside all state claims in a particular area.” Pinney, 
    402 F.3d at 450
    . The
    16
    According to Defendants, the State of Maryland and other municipalities have availed
    themselves of § 7607(b)(1)’s procedures by bringing actions against the EPA. See Defs.’
    Opening Br. 49 n.14. This suggests that Baltimore is only required to do the same if it
    wants a federal court to review the EPA’s actions or rulemaking process. § 7607(b)(1).
    Baltimore is not seeking such relief. If anything, this indicates that Baltimore’s Complaint
    is seeking a different relief since it has not joined the State of Maryland in those lawsuits.
    49
    CAA contains two savings clauses that preserve state and local governments’ legal right to
    impose standards and limitations on air pollution that are stricter than national
    requirements. See §§ 7416, 7604(e). One concerns citizen suits under the CAA and
    specifically counsels:    “Nothing in this section shall restrict any right which any
    person . . . may have under any statute or common law to seek enforcement of any emission
    standard or limitation or to seek any other relief[.]” § 7604(e) (emphases added). The
    second savings clause provides:
    [N]othing in this chapter shall preclude or deny the right of any State or
    political subdivision thereof to adopt or enforce (1) any standard or limitation
    respecting emissions of air pollutants or (2) any requirement respecting
    control or abatement of air pollution; except that if an emission standard or
    limitation is in effect under an applicable implementation plan . . . , such
    State or political subdivision may not adopt or enforce any emission standard
    or limitation which is less stringent than the standard or limitation under such
    plan or section.
    § 7416 (emphases added). Under §§ 7604(e) and 7416, except to the extent a state law
    falls below a federal requirement under a limitation plan, the plain language of the CAA’s
    savings clauses evidence no congressional intent for the CAA to be the exclusive cause of
    action for air pollution claims. Section 7604(e) permits parties to resort to state statutes
    and state common law to enforce emission standards or “to seek any other relief.” Section
    7416 permits States and political subdivisions to “adopt or enforce . . . any” standard,
    limitation, or requirement about air pollution that are more demanding than federal
    provisions, and this broad language encompasses state-law claims that may be used to rein
    in air pollution. See City of Oakland, 969 F.3d at 907–08 (holding that the CAA did not
    satisfy the requirements of complete preemption for state-law claims involving public
    50
    nuisance after considering § 7416’s impact). These sweeping clauses—both of which show
    respect for state law—fail to show how Congress clearly and manifestly intended to
    completely preempt the types of claims Baltimore presents here, tipping the scale against
    complete preemption. See Johnson, 781 F.3d at 703 (holding that a savings clause
    counseled against finding complete preemption of § 332 of the Communications Act); Her
    Majesty the Queen in Right of Ont. v. City of Detroit, 
    874 F.2d 332
    , 342–43 (6th Cir. 1989)
    (noting that § 7604(e) of the CAA “clearly indicates that Congress did not wish to abolish
    state control” and declining to apply complete preemption to a Michigan statute).
    In the face of the CAA’s savings clauses, Defendants posit that the CAA “authorizes
    states to impose additional restrictions only on in-state emissions[] and . . . provide[s]
    remedies only for localized injuries stemming from in-state air pollution.” Defs.’ Opening
    Br. 50. But Defendants’ argument continues to rest on a fundamental confusion of
    Baltimore’s claims. None of Baltimore’s claims concern emission standards, federal
    regulations about those standards, or pollution permits.         Their Complaint is about
    Defendants’ fossil-fuel products and extravagant misinformation campaign that
    contributed to its injuries. Indeed, since we are operating under the well-pleaded complaint
    rule, Aetna Health, 
    542 U.S. at 207
    , we take Baltimore at its word when it claims that it
    “does not seek to impose liability on Defendants for their direct emissions of greenhouse
    gases and does not seek to restrain Defendants from engaging in their business operations.”
    J.A. 47.
    In sum, there is simply nothing within the “text of the statute” suggesting that state-
    law claims are completely displaced by the CAA. See Lontz, 
    413 F.3d at 441
    . And more
    51
    specifically, we do not see anything within the CAA requiring the complete preemption of
    state-law claims that seek to impose liability upon fossil-fuel products that are allegedly
    harmful to the public at large. We join our sister circuits and reject this complete-
    preemption argument from Defendants, especially when Defendants do not identify any
    statutory sections that indicate the complete preemption of Baltimore’s state-law claims.
    See Bd. of Cnty. Comm’rs of Boulder Cnty., 25 F.4th at 1263–65 (noting that the CAA
    “does not provide an exclusive cause of action for suits against private polluters, nor does
    it completely displace all state law in that area” and rejecting Defendants’ argument); City
    of Oakland, 969 F.3d at 907–08 (holding that the CAA did not satisfy the requirements of
    complete preemption for state-law claims involving public nuisance). Thus, we affirm the
    district court’s rejection of complete preemption under the CAA and find no federal-
    question jurisdiction on this basis.
    D.
    Relying upon a federal-enclaves theory, Defendants assert that federal jurisdiction
    is appropriate because a “substantial portion” of their operations occurred on federal land,
    including the Elk Hills Naval Petroleum Reserve in Kern County, California, and multiple
    naval installations.   Defs.’ Opening Br. 46–47.       Defendants are correct that naval
    installations are generally considered federal enclaves. See Allison v. Boeing Laser Tech.
    Servs., 
    689 F.3d 1234
    , 1235 (10th Cir. 2012) (observing that federal enclaves include
    “military bases, federal facilities, and even some national forests and parks”). However,
    federal-question jurisdiction is not conferred merely because some of Defendants’
    52
    activities occurred on military installations.       We decline to endorse Defendants’
    overreaching approach to federal-question jurisdiction premised on federal enclaves.
    Congress possesses the power to “exercise exclusive Legislation in all Cases
    whatsoever, over such District (not exceeding ten Miles square) as may, . . . become the
    Seat of the Government of the United States, and . . . exercise like Authority over all Places
    purchased by the Consent of the Legislature of the State in which the Same shall be, for
    the Erection of Forts, Magazines, Arsenals, dock-Yards, and other needful Buildings[.]”
    U.S. Const. art. I, § 8, cl. 17. The federal government thus possesses “sole jurisdiction”
    over its enclaves. Surplus Trading Co. v. Cook, 
    281 U.S. 647
    , 652 (1930). Accordingly,
    “[f]ederal courts have federal question jurisdiction over tort claims that arise on ‘federal
    enclaves.’” Durham v. Lockheed Martin Corp., 
    445 F.3d 1247
    , 1250 (9th Cir. 2006)
    (citations omitted); see also Akin v. Ashland Chem. Co., 
    156 F.3d 1030
    , 1034 (10th Cir.
    1998) (“Personal injury actions which arise from incidents occurring in federal enclaves
    may be removed to federal district court as a part of federal question jurisdiction.”).
    When deciding if a federal enclave confers jurisdiction, this Court has considered
    whether the injury itself was sustained within the federal enclave. See Stokes v. Adair, 
    265 F.2d 662
    , 663, 665–66 (4th Cir. 1959). In Stokes, we were tasked with deciding whether a
    district court possessed federal-question jurisdiction over an automobile accident that
    caused a plaintiff to sustain injuries “on the United States Military Reservation of Fort
    Leavenworth in the State of Kansas . . . .” 
    Id. at 663
    . We held that the district court had
    federal-question jurisdiction because Kansas ceded Fort Leavenworth to the federal
    government, and we specifically noted that personal-injury actions occurring “on a federal
    53
    reservation” were not precluded from trial in state courts. 
    Id.
     at 665–66. Other federal
    courts have similarly reasoned that federal-question jurisdiction only lies over federal
    enclaves when personal injuries are sustained within an enclave’s boundaries. See Akin,
    156 F.3d at 1034–36 (holding that federal-question jurisdiction was not ascertainable from
    a complaint when it stated that a plaintiff’s injuries were “sustained ‘while working at’” a
    federal enclave, but jurisdiction was conferred when an interrogatory eventually provided
    “sufficient notice” that the relevant conduct took place “wholly within the enclave”);
    Mater v. Holley, 
    200 F.2d 123
    , 123–25 (5th Cir. 1952) (holding there was federal-question
    jurisdiction when a claimant suffered personal injuries “within the boundaries” of Fort
    McPherson, Georgia, and Fort McPherson was ceded to the United States by Georgia).
    On the Complaint’s face, Baltimore specifically states that “‘Baltimore’ refers to
    Baltimore City’s geographic area, and specifically to non-federal lands within its
    boundaries, unless otherwise stated.” J.A. 43. Baltimore therefore excludes federal
    enclaves from its Complaint “unless otherwise stated.” J.A. 43. As to where Baltimore’s
    climate-change injuries have occurred, the Complaint emphasizes they have taken place
    within Baltimore’s borders and not on a federal enclave. For instance, the Complaint
    maintains that climate change, resulting from Defendants’ fossil-fuel products and
    marketing campaign, has damaged Baltimore’s internal infrastructure, including its
    railways and roads, and increased the costs of maintaining, repairing, and replacing
    infrastructure within Baltimore. See J.A. 144–45. It also describes the adverse impacts
    that climate change will have on the health of Baltimore’s citizens as opposed to those
    living on federal enclaves. See J.A. 146–47. None of these allegations suggest that
    54
    Baltimore’s injuries occurred or will occur on federal enclaves. All of Baltimore’s harms
    are pleaded within the confines and boundaries of Baltimore City. See J.A. 139–48. So
    given Baltimore’s alleged injuries have not occurred on a federal enclave, it seeks relief
    for harms sustained on non-federal land, which precludes the exercise of federal-question
    jurisdiction. See Bd. of Cnty. Comm’rs of Boulder Cnty., 25 F.4th at 1271–72 (rejecting
    Defendants’ broad theory of federal enclaves and holding federal-question jurisdiction was
    an improper basis for removal when injuries on federal lands were expressly disclaimed).
    Again, federal-question jurisdiction tied to federal enclaves “generally requires ‘that
    all pertinent events t[ake] place on a federal enclave.’” Id. at 1271 (quoting Rosseter v.
    Indus. Light & Magic, No. C 08-04545 WHA, 
    2009 WL 210452
    , at *1 (N.D. Cal. Jan. 27,
    2009)). The district court reasonably concluded that “the claims appear to arise in
    Baltimore, where the City allegedly suffered and will suffer harm.” BP P.L.C., 388 F.
    Supp. 3d at 566. We agree with the district court and affirm its firm rejection of jurisdiction
    based on this doctrine.
    E.
    Continuing on their quest for federal jurisdiction, Defendants invoke the OCSLA’s
    jurisdictional grant to reach federal court. They believe “[Baltimore]’s claims as alleged
    encompass all of Defendants ‘exploration and production’ of fossil fuels on the OCS . . . .”
    Defs.’ Opening Br. 43. Rejecting Defendants jurisdictional invocation of the OCSLA, the
    district court held that Defendants failed to show a but-for connection between Baltimore’s
    causes of action and the Outer Continental Shelf (OCS). BP P.L.C., 388 F. Supp. 3d at
    55
    566–67. Defendants do not believe a but-for connection is a requirement under the
    OCSLA’s jurisdictional grant, and, even if it is, they maintain it is satisfied. We disagree
    with Defendants on both fronts.
    1.
    We first consider whether the OCSLA’s jurisdictional grant requires a but-for
    connection between a cause of action and the OCS. In full, the OCSLA provides federal
    district courts with original jurisdiction to hear cases involving the OCS 17:
    [T]he district courts of the United States shall have jurisdiction of cases and
    controversies arising out of, or in connection with (A) any operation
    conducted on the outer Continental Shelf which involves exploration,
    development, or production of the minerals, of the subsoil and seabed of the
    outer Continental Shelf, or which involves rights to such minerals, or (B) the
    cancellation, suspension, or termination of a lease or permit under this
    subchapter.
    
    43 U.S.C. § 1349
    (b)(1) (emphasis added). Section 1349(b)(1) is a “broad” grant of federal
    jurisdiction. Texaco Expl. & Prod., Inc. v. AmClyde Engineered Prods. Co., Inc., 
    448 F.3d 760
    , 768 (5th Cir. 2006). When assessing jurisdiction under this provision, we consider
    whether “(1) the activities that caused the injury constituted an ‘operation’ ‘conducted on
    the outer Continental Shelf’ that involved the exploration and production of minerals, and
    (2) the case ‘arises out of, or in connection with’ the operation.” In re Deepwater Horizon,
    17
    The OCSLA defines “outer Continental Shelf” as “all submerged lands lying seaward
    and outside of the area of lands beneath navigable waters as defined in section 1301 of this
    title, and of which the subsoil and seabed appertain to the United States and are subject to
    its jurisdiction and control.” 
    43 U.S.C. § 1331
    (a). “Lands beneath navigable waters” has
    three different definitions that are irrelevant to our jurisdictional inquiry. 
    Id.
     § 1301(a)(1)–
    (3).
    56
    
    745 F.3d 157
    , 163 (5th Cir. 2014) (citation omitted). Since Baltimore does not contest
    Defendants’ “operations” on the OCS, we are only concerned with the meaning of “arising
    out of, or in connection with,” which the OCSLA does not define. Departing from the Fifth
    Circuit, Defendants preliminarily contest whether those phrases impose a but-for
    connection at all. We thus resort to our tools of statutory construction to determine if those
    phrases require a but-for connection between a plaintiff’s case and operations on the OCS.
    Those tools include: (1) statutory text; (2) statutory structure; (3) legislative history; (4)
    judicial interpretations; (5) related statutes; and (6) congressional purpose. See Brown &
    Williamson Tobacco Corp. v. Food & Drug Admin., 
    153 F.3d 155
    , 162 (4th Cir. 1998);
    United States v. Jackson, 
    759 F.2d 342
    , 344 (4th Cir. 1985).
    Examining the text alongside relevant case law resolves this matter. To “arise”
    means “[t]o originate; to stem (from)” or “[t]o result (from).” Arise, BLACK’S LAW
    DICTIONARY (11th ed. 2019). “Connection” denotes a “contextual relation or association”
    or “relationship in fact.”      Connection, MERRIAM-WEBSTER, https://www.merriam-
    webster.com/dictionary/connection (last visited Feb. 27, 2022).           Under their plain
    meanings, “arising out of” and “in connection with” both require a causal relationship to
    determine if a given controversy actually “result[s] (from)” or possesses a “relationship in
    fact [with]” activities conducted on the OCS. See Burrage v. United States, 
    571 U.S. 204
    ,
    214 (2014) (holding that “results from” imposes but-for causation); Levine v.
    Diamanthuset, Inc., 
    950 F.2d 1478
    , 1485–86 (9th Cir. 1991) (noting that “in connection
    with” requires a causal relationship for actions under Rule 10b-5, which implements
    section 10(b) of the Securities and Exchange Act of 1934); Arthur Young & Co. v. Reves,
    57
    
    937 F.2d 1310
    , 1327–28 (8th Cir. 1991) (stating that “in connection with” is satisfied under
    Rule 10b-5 when but-for causation is shown). We are not alone in this conclusion. Federal
    courts interpreting “arise out of, or in connection with” under the OCSLA have consistently
    determined that it imposes a but-for relationship between a party’s case and operations on
    the OCS. See Bd. of Cnty. Comm’rs of Boulder Cnty., 25 F.4th at 1272–75; In re
    Deepwater Horizon, 745 F.3d at 163; Tenn. Gas Pipeline v. Hous. Cas. Ins. Co., 
    87 F.3d 150
    , 155 (5th Cir. 1996); Recar v. CNG Producing Co., 
    853 F.2d 367
    , 369 (5th Cir. 1988).
    We decline to disrupt this settled and sensible trend.
    Accordingly, we join our sister circuits and find that invoking jurisdiction
    under § 1349(b)(1) requires a but-for connection between a claimant’s cause of action and
    operations on the OCS. See Bd. of Cnty. Comm’rs of Boulder Cnty., 25 F.4th at 1272–75;
    In re Deepwater Horizon, 745 F.3d at 163.
    2.
    When applying a but-for test, we must ask if Baltimore’s injuries “would not have
    occurred” but for Defendants’ conduct on the OCS. See Wright v. Lassiter, 
    921 F.3d 413
    ,
    419 (4th Cir. 2019) (explaining but-for causation); see also Martin v. Duffy, 
    977 F.3d 294
    ,
    299 (4th Cir. 2020) (same); Talkington v. Atria Reclamelucifers Fabrieken BV (Cricket
    BV), 
    152 F.3d 254
    , 264 (4th Cir. 1998) (same). Requiring a but-for connection still
    “implies a broad jurisdictional grant under [the OCSLA] . . . .” Tenn. Gas Pipeline, 
    87 F.3d at 155
    . But a “mere connection” between a claimant’s case and operations on the OCS is
    insufficient to show federal jurisdiction if the relationship is “too remote.” In re Deepwater
    58
    Horizon, 745 F.3d at 163 (citation omitted); see also Plains Gas Sols., LLC v. Tenn. Gas
    Pipeline Co., LLC, 
    46 F. Supp. 3d 701
    , 704–05 (S.D. Tex. 2014) (noting that the but-for
    test is not “limitless” under the OCSLA).
    Here, Baltimore’s allegations and injuries are not confined to Defendants’ fossil-
    fuel activities on the OCS. Defendants are also being sued for unlawfully marketing,
    promoting, and ultimately selling their fossil-fuel products, which includes their collective
    failure to warn the public of the known dangers associated with their fossil-fuel products.
    See J.A. 43, 150–71. Defendants’ marketing practices, which led to increased consumption
    of their fossil-fuel products and then climate change, are far removed from their OCS
    activities and their tort liability. In other words, irrespective of Defendants’ activities on
    the OCS, Baltimore’s injuries still exist as a result of that distinct marketing conduct.
    Regardless, Defendants concede that some of their fossil-fuel production occurred outside
    of the OCS. Defs.’ Opening Br. 41, 46–47; J.A. 41 (Defendants’ noting that their oil and
    gas activities occurred within the National Wildlife Refuge System). And Baltimore’s
    Complaint contains examples of Defendants’ land-based activities that contributed to its
    injuries and are hundreds of miles away from the OCS.             See J.A. 66 (mentioning
    CONSOL’s coal mines in Appalachia). Because Baltimore’s injuries remain even after we
    disregard “whatever slice” of Defendants’ fossil-fuel production occurred on the OCS, we
    cannot find a but-for connection satisfying the OCSLA’s jurisdictional grant. See Bd. of
    Cnty. Comm’rs of Boulder Cnty., 25 F.4th at 1272–75 (rejecting Defendants’ invocation of
    jurisdiction under the OCSLA using the but-for cause inquiry).
    59
    Case law supports this finding since Baltimore’s Complaint only has a “mere
    connection” to the OCS. In Tennessee Gas Pipeline, a barge physically “allided” with a
    fixed platform on the OCS, and the Fifth Circuit found a but-for connection, concluding
    “there would not have been an accident had Tennessee Gas not built its platform to extract
    minerals from the OCS.” 
    87 F.3d at 152, 155
    . Most recently, in In re Deepwater Horizon,
    the Fifth Circuit found a but-for connection when it was “undeniable” that contaminants
    would not have entered the State of Louisiana’s territorial waters but for drilling and
    exploration on the OCS. 745 F.3d at 163–64. Additional case law features tort claims
    involving personal injuries with a direct connection to an OCS operation. See Barker v.
    Hercules Offshore, Inc., 
    713 F.3d 208
    , 213 (5th Cir. 2013) (“Barker’s employment on the
    jack-up rig was directly related to the development of minerals or other natural resources
    on the OCS.” (citation omitted)); Hufnagel v. Omega Serv. Indus., Inc., 
    182 F.3d 340
    , 350
    (5th Cir. 1999) (“Hufnagel’s injuries occurred on a stationary drilling platform involved in
    the ‘exploration, development, or production’ of minerals on the shelf.” (citation omitted));
    Ronquille v. Aminoil Inc., C/A No. 14-164, 
    2014 WL 4387337
    , at *2 (E.D. La. Sept. 4,
    2014) (finding the but-for test satisfied where a plaintiff alleged he was exposed to asbestos
    when he provided direct support for “Shell Oil’s rigs within [the OCS]”). Baltimore’s
    Complaint does not align with cases finding connections to the OCS.              Instead, the
    allegations contained therein turn on Defendants’ deceptive marketing practices as well as
    the resulting impacts of their fossil-fuel products, both of which are far removed from any
    production occurring on the OCS. See Bd. of Cnty. Comm’rs of Boulder Cnty., 25 F.4th at
    1273–75; see also Plaquemines v. Total Petrochemical & Refining USA, Inc., 
    64 F. Supp. 60
    3d 872, 898 (E.D. La. 2014) (declining to find jurisdiction under the OCSLA when there
    were “injuries sustained in state waters from activities that occurred off the shelf” and
    finding a relationship to the OCS as “too remote and attenuated”). Contrary to dangerous
    contaminants entering a State’s territorial waters as a result from drilling on the OCS, or
    the worker who is injured on an OCS platform, Baltimore’s claims of Defendants’ trickery
    and deceit, conduct leading to climate change, bear a weak relationship to the OCS.
    Plaquemines, 64 F. Supp. 3d at 898. We find that this is all “too remote and attenuated”
    for a but-for connection under OCSLA. Id.
    Ignoring the OCSLA’s text and judicial decisions applying it, Defendants argue that
    the OCSLA’s policy aims will be frustrated and a parade of horrible outcomes will ensue
    if we decline federal jurisdiction. To them, if Baltimore is ultimately granted relief, “[s]uch
    relief would substantially discourage OCS production and jeopardize the future viability of
    the federal OCS leasing program, potentially costing the federal government hundreds of
    millions of dollars in revenues.” Defs.’ Opening Br. 45. Maybe so. But under our laws,
    “a defendant cannot establish removal jurisdiction by mere speculation and conjecture,
    with unreasonable assumptions.” Ibarra v. Manheim Invs., Inc., 
    775 F.3d 1193
    , 1197 (9th
    Cir. 2015); see also Bd. of Cnty. Comm’rs of Boulder Cnty., 25 F.4th at 1275. Even if such
    speculative and policy-laden arguments were permitted, the authorities Defendants rely
    upon for their jurisdictional theory are markedly different from Baltimore’s suit because
    they involve the intersection of commercial disputes satisfying the “operation” element of
    the OCSLA, not injurious torts impacting a municipality’s citizenry and internal
    infrastructure. See Defs.’ Opening Br. 45 (citing EP Operating Ltd. P’ship v. Placid Oil
    61
    Co., 
    26 F.3d 563
    , 566 (5th Cir. 1994) (a party seeking partition by licitation); United
    Offshore Co. v. S. Deepwater Pipeline Co., 
    899 F.2d 405
    , 406 (5th Cir. 1990) (a claimant
    requesting the compulsion of arbitration and dissolution of an injunction); Amoco Prod.
    Co. v. Sea Robin Pipeline Co., 
    844 F.2d 1202
    , 1203–04 (5th Cir. 1988) (a party disputing
    its take-or-pay obligations in contracts for the purchase and sale of natural gas)). As it
    concerns physical damages to persons and property, we thus join other courts in rejecting
    this policy-based theory of jurisdiction under the OCSLA. See Bd. of Cnty. Comm’rs of
    Boulder Cnty., 25 F.4th at 1275; Plaquemines, 64 F. Supp. 3d at 896–98.
    For the foregoing reasons, we affirm the district court’s thoughtful rejection of the
    OCSLA’s jurisdictional grant as a basis for federal jurisdiction over Baltimore’s claims.
    F.
    Defendants next press removal jurisdiction under the bankruptcy removal statute.
    The bankruptcy removal statute provides:
    A party may remove any claim or cause of action in a civil action other than
    . . . a civil action brought by a governmental unit’s police or regulatory
    power, to the district court where such civil action is pending, if such district
    court has jurisdiction of such claim or cause of action under section 1334 of
    this title.
    
    28 U.S.C. § 1452
    (a). In turn, § 1334(b) states that federal district courts shall have “original
    but not exclusive jurisdiction of all civil proceedings arising under title 11, or arising in or
    related to a case under title 11.” Defendants do not argue that Baltimore’s Complaint
    involves a bankruptcy proceeding under Title 11. Instead, they maintain that Baltimore’s
    Complaint is “related to” bankruptcy cases because it primarily seeks to hold them liable
    62
    for the “pre-bankruptcy conduct” of a Chevron subsidiary, Texaco, Inc. Defs.’ Opening
    Br. 52. Defendants describe Texaco’s bankruptcy plan, along with those of Defendants’
    other predecessors, subsidiaries, and affiliates, as confirmed. Id. But as with Defendants’
    reliance upon the OCSLA, Baltimore’s suit is too remote for bankruptcy removal to lie.
    Generally, at the pre-confirmation stage of a reorganization plan, we first stated that
    the “related to” test addressed “whether the outcome of [a civil] proceeding could
    conceivably have any effect on the estate being administered in bankruptcy.” In re Celotex
    Corp., 
    124 F.3d 619
    , 625 (4th Cir. 1997) (quoting Pacor, Inc. v. Higgins, 
    743 F.2d 984
    ,
    994 (3d Cir. 1984)). However, we then endorsed a “close nexus” test at the post-
    confirmation stage, allowing jurisdiction over “[m]atters that affect the interpretation,
    implementation, consummation, execution, or administration of the confirmed plan . . . .”
    Valley Historic Ltd. P’ship v. Bank of N.Y., 
    486 F.3d 831
    , 836–37 (4th Cir. 2007) (alteration
    in original) (quoting In re Resorts Int’l, Inc., 
    372 F.3d 154
    , 167 (3d Cir. 2004)); see also
    In re Kirkland, 
    600 F.3d 310
    , 317 (4th Cir. 2010) (same). Essentially, a plaintiff’s suit
    “must affect an integral aspect of the bankruptcy process” for “related to” jurisdiction to
    exist. In re Kirkland, 
    600 F.3d at 317
     (citation omitted).
    1.
    Defendants explicitly rely upon a 1988 confirmed plan from Chevron’s subsidiary,
    Texaco, to contend we possess bankruptcy jurisdiction. 18 First, we find it hard to fathom
    18
    The record does not appear to contain Texaco’s 1988 confirmed plan.
    63
    how Baltimore’s suit, filed thirty years later, has any “close nexus” to Texaco’s confirmed
    planned because it is so far removed from the initial bankruptcy confirmation. See Nuveen
    Mun. Tr. ex rel. Nuveen High Yield Mun. Bond Fund v. Withumsmith Brown, P.C., 
    692 F.3d 283
    , 294 (3d Cir. 2012) (noting that bankruptcy jurisdiction “wanes” after the
    confirmation of a case). Secondly, Baltimore’s claims are completely independent and
    distinct from Texaco’s bankruptcy plan, there is no indication that the bankruptcy plan
    involved climate change, and Defendants do not explain how a judgment more than thirty
    years later could impact Texaco’s estate. See Valley Historic, 
    486 F.3d at 837
     (finding no
    “related to” jurisdiction when a bankruptcy plan was “substantially consummated”); New
    Horizon of N.Y. LLC v. Jacobs, 
    231 F.3d 143
    , 154–55 (4th Cir. 2000) (holding there was
    no “related to” jurisdiction for state-law claims that were “completely unrelated to the . . .
    administration of the bankruptcy estates”). For those reasons, we conclude Baltimore’s
    suit is too far removed from Texaco’s 1988 confirmed plan for us to find a “close nexus”
    warranting bankruptcy jurisdiction.
    Citing to a powerpoint presentation they filed in the district court, Defendants
    speculate that other corporate entities related to Defendants “may also be operating under
    confirmed bankruptcy cases.” Defs.’ Opening Br. 52 (citing Ex. 20 to Decl. of Joshua S.
    Lipshutz, Mayor & City Council of Balt. v. BP P.L.C., 
    388 F. Supp. 3d 538
     (D. Md. 2019)
    (No. 1:18-cv-02357-ELH), ECF No. 125-20 at 3)).            Interestingly, Defendants’ filed
    presentation includes 134 bankruptcy filings from energy companies from 2015 to 2017.
    Yet, Defendants do not specify if any of those corporate entities are actually related to any
    of them, nor do they indicate if or when those bankruptcy cases were confirmed by federal
    64
    courts. By failing to direct us to anything further, we find this is insufficient to carry any
    burden for bankruptcy removal and decline to do counsel’s work. Prince, 848 F.3d at 176;
    N.Y. Rehab. Care Mgmt., LLC v. Nat’l Lab. Rels. Bd., 
    506 F.3d 1070
    , 1076 (D.C. Cir.
    2007) (“It is not enough merely to mention a possible argument in the most skeletal way,
    leaving the court to do counsel’s work.” (citation omitted)).
    Accordingly, we dispense with Defendants’ primary arguments because they have
    failed to show that Baltimore’s suit has a “close nexus” or is “related” to any bankruptcy
    plan involving any of its predecessors, subsidiaries, or affiliates under § 1452(a).
    2.
    Even were we to find bankruptcy jurisdiction is proper, removal is still inappropriate
    if the proceeding is a civil action by a “governmental unit to enforce such governmental
    unit’s police or regulatory power . . . .” § 1452(a). Baltimore’s suit is such an action, and
    we note that Defendants only advance one sentence concerning whether this “police or
    regulatory power” exception is inapplicable to their bankruptcy removal invocation. See
    Defs.’ Opening Br. 52–53.
    Baltimore clearly qualifies as a “governmental unit” since it is a municipality under
    Title 11 and, thus, for the purposes of § 1452(a) as well. See 
    11 U.S.C. § 101
    (27) (defining
    a “governmental unit” as a “municipality”).         This Court has not yet interpreted a
    governmental unit’s “police or regulatory power” under § 1452(a). But we have interpreted
    “police and regulatory power” under § 362(b)(4) of the bankruptcy code, which is an
    exception to the automatic stay of actions brought by creditors against debtors after
    65
    bankruptcy petitions are filed. See Safety-Kleen, Inc. (Pinewood) v. Wyche, 
    274 F.3d 846
    ,
    864–66 (4th Cir. 2001). In Safety-Kleen, this Court held that a “police and regulatory
    power” is being exercised if the purpose of a state law is to effectuate public policy or
    promote the public safety and welfare. 
    Id. at 865
     (citations omitted). We stated that this
    is an objective analysis that requires a court to “determine the primary purpose of the law
    that the state is attempting to enforce.” 
    Id.
     (citations omitted).
    As noted above, Baltimore brings eight different claims against Defendants, and all
    of those claims seek to shift the costs of climate-change injuries onto Defendants as
    opposed to burdening “local taxpayers, residents, or broader segments of the public.” J.A.
    47.   In its public nuisance claim, for example, Baltimore asserts that Defendants’
    interference with its property, infrastructure, and public resources will be “borne by
    [Baltimore’s] citizens” because they will purportedly suffer economic losses and negative,
    public-health consequences. J.A. 151. This is easily said for Baltimore’s other claims as
    well. Baltimore thus seeks to protect its citizens, property, and resources by suing
    Defendants, all of whom are private parties, for the detrimental impacts of their fossil-fuel
    products. See J.A. 150–71. We have no doubt this suit is a valid exercise of Baltimore’s
    police power. See Crutcher v. Kentucky, 
    141 U.S. 47
    , 61 (1891) (“[T]he police power of
    the state extends to almost everything within its borders,–to the suppression of nuisances;
    [and] to the prohibition of manufactures deemed injurious to the public health . . . .”
    (citations omitted)); Sansotta v. Town of Nags Head, 
    724 F.3d 533
    , 541 (4th Cir. 2013)
    (“The Town’s actions to abate a nuisance were reasonable . . . uses of its police
    power . . . .” (citation omitted)). Accordingly, we hold that the exception to bankruptcy
    66
    removal is applicable, precluding Defendants’ ability to remove under § 1452(a). See In
    re Methyl Tertiary Butyl Ether (“MTBE”) Prods. Liab. Litig., 
    488 F.3d 112
    , 133 (2d Cir.
    2007) (holding that “police or regulatory powers” were exercised under § 1452(a) when
    California and New Hampshire sought to “remedy and prevent environmental damage with
    potentially serious consequences for public health”); Safety-Kleen, 
    274 F.3d at 866
    (holding there was a “clear exercise” of South Carolina’s regulatory power when it sought
    to deter environmental misconduct through financial assurance regulations).
    Thus, we find no federal jurisdiction under the bankruptcy removal statute and
    affirm the district court in this regard.
    G.
    With few theories remaining, Defendants attempt to reach federal court by
    appealing to our admiralty jurisdiction under the Constitution and 
    28 U.S.C. § 1333
    (1).
    They believe that admiralty jurisdiction is conferred merely because “fossil-fuel extraction
    occurs on vessels engaged in maritime commerce[.]” Defs.’ Opening Br. 53. We reject
    Defendants’ far-reaching view of admiralty jurisdiction.
    1.
    The Constitution extends our judicial power to “all Cases of admiralty and maritime
    Jurisdiction.” U.S. Const. art. III, § 2. Congress provides that “[t]he district courts shall
    have original jurisdiction, exclusive of the courts of the States, of: . . . Any civil case of
    admiralty or maritime jurisdiction, saving to suitors in all cases all other remedies to which
    67
    they are otherwise entitled.”     
    28 U.S.C. § 1333
    (1).       The saving-to-suitors clause
    of § 1333(1) “preserves remedies and the concurrent jurisdiction of state courts over some
    admiralty and maritime claims.” Lewis v. Lewis & Clark Marine, Inc., 
    531 U.S. 438
    , 445
    (2001) (citations omitted). The Supreme Court previously emphasized that claims brought
    under the saving-to-suitors clause in state court are not removable to federal court based
    on federal-question jurisdiction. See Romero v. Int’l Terminal Operating Co., 
    358 U.S. 354
    , 371–75 (1959). We have likewise stated that the savings-to-suitors clause “preserves
    a maritime suitor’s election to pursue common-law remedies in state court.” Servis v.
    Hiller Sys. Inc., 
    54 F.3d 203
    , 206 (4th Cir. 1995). Yet, “[a]dmirality and maritime cases
    may . . . be removable to federal court when there exists some independent basis for federal
    jurisdiction, such as diversity of citizenship or when federal jurisdiction is independently
    established by a federal maritime statute.” Id. at 207 (citations omitted) (cleaned up); see
    also In re Lockheed Martin Corp., 
    503 F.3d 351
    , 356 (4th Cir. 2007).
    Adhering to those precedents, Baltimore argues that its state-law claims are not
    removable under § 1441, the general removal statute, if they sound in admiralty unless
    there is “some independent jurisdictional basis, such as diversity or federal question
    jurisdiction.” Baltimore’s Resp. Br. 52–53. Defendants aptly point out that the Venue
    Clarification Act of 2011 eliminated a portion of § 1441(b) that federal courts previously
    believed blocked the removal of admiralty claims without another jurisdictional basis. Pub.
    L. No. 112-63, § 103, 
    125 Stat. 758
    , 759 (2011); see also Lu Junhong v. Boeing Co., 
    792 F.3d 805
    , 817–18 (7th Cir. 2015) (holding that § 1441 permits removal when there is an
    admiralty case under § 1333(1)). The parties, however, only devote one paragraph each to
    68
    this admittedly complicated issue that has divided federal courts. Thomas J. Schoenbaum,
    Admiralty and Maritime Law § 4.3, Westlaw (database updated Dec. 2021) (“After 2011,
    courts split on whether the working of the amended statute changes the rule for removal of
    maritime claims.”). Because of their inadequate briefing, we decline to formally decide
    whether § 1441 permits removal based on the admiralty jurisdiction grant under § 1333(1).
    United States v. Banks, 
    884 F.3d 998
    , 1011 n.3 (10th Cir. 2018) (“Given the unsettled
    nature of this question and the parties’ inadequate briefing, we decline to decide this
    question here.”); see also Covey v. Assessor of Ohio Cnty., 
    777 F.3d 186
    , 198 n.11 (4th
    Cir. 2015) (same); Brownfield v. City of Yakima, 
    612 F.3d 1140
    , 1149 n.4 (9th Cir. 2010)
    (same). Instead, we press ahead under the assumption § 1441 permits removal because of
    the original jurisdiction grant of § 1333(1).
    2.
    To invoke admiralty jurisdiction, a party must satisfy “conditions both of location
    and of connection with maritime activity.” Jerome B. Grubart, Inc. v. Great Lakes Dredge
    & Dock Co., 
    513 U.S. 527
    , 534 (1995). To satisfy the location test, a tort must either
    “occur on navigable waters, or, if suffered on land, at least be caused by a vessel on
    navigable water.” White v. United States, 
    53 F.3d 43
    , 45 (4th Cir. 1995) (citing Grubart,
    
    513 U.S. at 534
    ). For the connection test, a court must decide: (1) “whether ‘the general
    features of the type of incident involved’ have ‘a potentially disruptive impact on maritime
    commerce[,]’” and (2) “whether the general character of the activity giving rise to the
    incident shows a substantial relationship to traditional maritime activity.” Id. at 46 (quoting
    69
    Grubart, 
    513 U.S. 534
    ). Defendants never argue that either condition is satisfied in their
    Opening Brief. See Grayson O Co., 856 F.3d at 316 (noting that parties waive arguments
    not raised in their opening brief). But we nevertheless find that Defendants’ admiralty
    invocation begins and ends with the location test.
    3.
    To begin, Baltimore pleads that its injuries involve damage to its “highways, rail
    lines, emergency response facilities, waste water facilities, and power plants . . . .” J.A.
    143. And, according to Baltimore, those land-based injuries stem from “sea level rise and
    associated impacts, increased frequency and severity of extreme precipitation events,
    increased frequency and severity of draught, [and the] increased frequency and severity of
    heat waves and extreme temperatures . . . .” J.A. 140 (emphasis added). While Baltimore
    alleges “sea level rise” as one of the many sources of its injuries, the actual torts involving
    Baltimore’s property have occurred on land as opposed to navigable waters. Grubart, 
    513 U.S. at 533
    . Baltimore’s Complaint never mentions any tort that occurred on navigable
    waters, and Defendants do not identify one.
    Still, the location test may be satisfied when a land-based tort is caused by a vessel
    on navigable waters. Grubart, 
    513 U.S. at
    534 (citing 
    46 U.S.C. § 30101
    ). Defendants
    seem to argue that their “floating oil rigs” and “floating drilling platforms” are vessels
    meeting the location test. Without giving us more, we disagree. Whether a craft or
    structure qualifies as a “vessel” is typically a question of law, but it sometimes comes down
    to the facts. Manuel v. P.A.W. & Drilling & Well Serv., Inc., 
    135 F.3d 344
    , 347 (5th Cir.
    70
    1998). Here, we deem it a question of law. The term “vessel” is “generally defined
    broadly[.]” Bernard v. Binnings Constr. Co., Inc., 
    741 F.2d 824
    , 828 (5th Cir. 1984).
    Usually, “[c]onventional ships and barges as well as such unconventional craft as
    submersible drilling barges and floating dredges which are designed for navigation and
    commerce are vessels within general maritime . . . jurisdiction and retain such status even
    while moored, dry-docked, or otherwise immobilized and secured to land.” Cook v. Belden
    Concrete Prods., Inc., 
    472 F.2d 999
    , 1001 (5th Cir. 1973) (emphasis added) (citations
    omitted). Defendants never suggest that their floating rigs and platforms were either
    designed for navigation or used for navigation when Baltimore suffered its injuries. They
    exclusively posit that their structures are used for oil and gas production, not for any
    navigation purposes. See Defs.’ Reply 28. This is fatal to a characterization of Defendants’
    floating rigs and platforms as vessels for admiralty jurisdiction. See Bernard, 
    741 F.2d at 831
     (noting that a structure is typically not a “vessel” under the Jones Act, 
    46 U.S.C. § 30104
    , when it is constructed primarily for use as a work platform); Gremillion
    v. Gulf Coast Catering Co., 
    904 F.2d 290
    , 291 n.2, 294 (5th Cir. 1990) (holding a barge
    used as a “floating hotel” was not a vessel under the Jones Act); Cook, 472 F.3d at 1102
    (holding that there was no vessel for maritime jurisdiction when a “floating construction
    platform was not designed for the purpose of navigation,” and it was “engaged in its
    primary function as a stationary construction platform”). But see Barker, 713 F.3d at 215
    (considering “jack-up drilling platforms” as vessels).
    Even if we credit Defendants with having vessels, Baltimore never alleges that any
    vessel on navigable waters caused any of its land-based injuries. Instead, Baltimore
    71
    repeatedly references “flood-associated damages” and “heavy rains” that have destroyed
    its infrastructure and exacerbated the health and environmental risks of its citizens. J.A.
    145. There are no allegations that its injuries were either “caused by the vessel itself or its
    appurtenances.” Egorov, Puchinsky, Afanasiev & Juring v. Terriberry, Carroll & Yancey,
    
    183 F.3d 453
    , 456 (5th Cir. 1999) (declining to find admiralty jurisdiction because neither
    the vessel nor its appurtenances caused physical damage on land or the alleged tort of
    tortious interference with contract); see also MLC Fishing, Inc. v. Velez, 
    667 F.3d 140
    ,
    141–42 (2d Cir. 2011) (holding that a claimant’s slip-and-fall on a ramp leading from a
    floating dock was not caused by a vessel or its appurtenances); Corrigan v. Harvey, 
    951 F. Supp. 948
    , 950, 952–53 (D. Haw. 1996) (holding admiralty jurisdiction did not lie when a
    plaintiff failed to allege any facts about his injury being caused by a vessel, and the parties
    agreed that the injury resulted from a physical fight on a pier). Since no vessel is alleged
    to have caused any of the committed torts, we find this issue easily resolved under the well-
    pleaded complaint rule. Metro. Life, 
    481 U.S. at 63
    .
    Accordingly, Defendants have failed to carry their removal burden of showing how
    their floating rigs and platforms qualify as vessels for the location test. We conclude that
    they are not, as a matter of law, especially since Baltimore’s Complaint never invokes them
    as the cause of its land-based torts. Cf. Grubart, 
    513 U.S. at
    529–30, 534–35 (holding that
    the location test was satisfied when a crane, attached to a barge, was used to lift and replace
    pilings around a bridge pier and a tunnel flooded after an accident). As such, we find no
    72
    merit to Defendants’ invocation of admiralty jurisdiction and affirm the district court’s
    rejection of this basis for federal jurisdiction. 19
    H.
    At this juncture, the only remaining path to federal court is Defendants’ theory of
    federal officer removal. In their Supplemental Brief, which was filed after their litigation
    in the Supreme Court, Defendants reiterate that Baltimore’s case is removable on the
    grounds that it originally raised on appeal, including federal officer removal. Defs.’ Suppl.
    Br. 2 n.1. Defendants do not present any new arguments or shortcomings concerning our
    previous holding that rejected the propriety of federal officer removal. The Supreme Court
    only required us to consider Defendants’ other removal grounds on remand and never
    addressed our holding concerning federal officer removal. Compare BP P.L.C., 141 S. Ct.
    at 1543, with BP P.L.C., 952 F.3d at 461–71. Nevertheless, because the Supreme Court
    vacated the entirety of our prior opinion, it has no precedential effect. Accordingly, we
    deem it appropriate to adopt and include our prior opinion and its reasoning, which rejects
    Defendants’ ability to remove under the federal officer removal statute.
    The federal officer removal statute authorizes the removal of state-court actions
    filed against “any officer (or any person acting under that officer) of the United States or
    19
    Because we hold Defendants failed to satisfy the location test for admiralty jurisdiction,
    we decline to address the connection test. Gruver v. Lesman Fisheries Inc., 
    489 F.3d 978
    ,
    982 (9th Cir. 2007) (“[A] party seeking to invoke federal maritime jurisdiction over a tort
    claim must satisfy both a location test and a connection test.” (citation omitted)).
    73
    of any agency thereof, in an official or individual capacity, for or relating to any act under
    color of such office.” 
    28 U.S.C. § 1442
    (a)(1). Its “basic purpose” is to protect against the
    interference with federal operations that would ensue if a state were able to arrest federal
    officers and agents acting within the scope of their authority and bring them to trial in a
    state court for an alleged state-law offense. Watson v. Philip Morris Co., 
    551 U.S. 142
    ,
    150 (2007) (explaining that state-court proceedings may (1) “reflect ‘local prejudice’
    against unpopular federal laws or federal officials”; (2) “impede [enforcement of federal
    law] through delay”; or (3) “deprive federal officials of a federal forum in which to assert
    federal immunity defenses” (citations omitted)).
    Thus, to remove a case under § 1442(a)(1), a private defendant must show: “(1) that
    it ‘act[ed] under’ a federal officer, (2) that it has ‘a colorable federal defense,’ and (3) that
    the charged conduct was carried out for [or] in relation to the asserted official authority.”
    Sawyer v. Foster Wheeler LLC, 
    860 F.3d 249
    , 254 (4th Cir. 2017) (first alteration in
    original) (citations omitted). Here, Defendants assert that Baltimore’s state-court action is
    removable under the federal officer removal statute “because the City ‘bases liability on
    activities undertaken at the direction of the federal government.’” BP P.L.C., 388 F. Supp.
    3d at 567 (citation omitted). It is the first and third prongs that are therefore in dispute.
    See Baltimore’s Resp. Br. 14–21. We begin with the first, though the acting-under and
    causal-nexus prongs often “collapse into a single requirement.” In re MTBE, 
    488 F.3d at 124
    ; see also 
    28 U.S.C. § 1442
    (a)(1) (targeting for removal state-court actions “for or
    relating to any act under color of [federal] office”).
    74
    1.
    The statutory phrase “acting under” describes “the triggering relationship between
    a private entity and a federal officer.” Watson, 
    551 U.S. at 149
    . Although the words
    “acting under” are “broad,” the Supreme Court has emphasized that they are not
    “limitless.” 
    Id. at 147
    . In cases involving a private entity, the “acting under” relationship
    requires that there at least be some exertion of “subjection, guidance, or control” on the
    part of the federal government. See 
    id. at 151
     (quoting Webster’s New International
    Dictionary 2765 (2d ed. 1953)). Additionally, “precedent and statutory purpose” make
    clear that “‘acting under’ must involve an effort to assist, or to help carry out, the duties or
    tasks of the federal superior.” 
    Id. at 152
    .
    In Watson, the Supreme Court held that “simply complying with the law” does not
    constitute the type of “help or assistance necessary to bring a private [entity] within the
    scope of the statute,” 
    id.,
     no matter how detailed the government regulation or how
    intensely the entity’s activities are supervised and monitored, see 
    id. at 153
    . In doing so,
    the Court distinguished several decisions cited by the defendant there in which lower courts
    had held that private contractors fell within the terms of § 1442(a)(1), at least where the
    relationship was “an unusually close one involving detailed regulation, monitoring, or
    supervision.” Id. at 153 (citing Winters v. Diamond Shamrock Chem. Co., 
    149 F.3d 387
    (5th Cir. 1998)). The difference between those cases and a case involving a highly
    regulated private firm, the Court reasoned, was the fulfillment of a government need:
    The answer to this question lies in the fact that the private contractor in such
    cases is helping the Government to produce an item that it needs. The
    assistance that private contractors provide federal officers goes beyond
    75
    simple compliance with the law and helps officers fulfill other basic
    governmental tasks. In the context of Winters, for example, Dow Chemical
    fulfilled the terms of a contractual agreement by providing the Government
    with a product that it used to help conduct a war. Moreover, at least arguably,
    Dow performed a job that, in the absence of a contract with a private firm,
    the Government itself would have had to perform.
    
    Id.
     at 153–54.
    The Supreme Court found these circumstances sufficient to distinguish Dow
    Chemical (the contractor in Winters) from the regulated tobacco companies who sought
    removal in Watson, and so it did not address “whether and when particular circumstances
    may enable private contractors to invoke the statute.” Id. at 154. Nevertheless, in light of
    the Court’s reasoning, we have relied on Watson to hold that certain private contractors
    “act under” federal officials. See Sawyer, 860 F.3d at 255. In Sawyer, we observed that
    “courts have unhesitatingly treated the ‘acting under’ requirement as satisfied where a
    contractor seeks to remove a case involving injuries arising from equipment that it
    manufactured for the government.” Id. Thus, in that case, we found that the defendant
    “acted under” the United States Navy when it manufactured boilers to be used aboard naval
    vessels per a detailed government contract. See id. at 252–53, 255.
    2.
    Here, Defendants collectively seek removal under § 1442 based on three contractual
    relationships between certain Defendants and the federal government: (1) fuel supply
    agreements between one Defendant (Citgo) and the Navy Exchange Service Command
    (“NEXCOM”) from 1988 to 2012; (2) oil and gas leases administered by the Secretary of
    the Interior under the OCSLA; and (3) a 1944 unit agreement between the predecessor of
    76
    another Defendant (Chevron) and the U.S. Navy for the joint operation of a strategic
    petroleum reserve in California known as the Elk Hills Reserve. For the reasons that
    follow, we agree with Baltimore that none of these relationships are sufficient to justify
    removal under the federal officer removal statute in this case, either because they fail to
    satisfy the acting-under prong or because they are insufficiently related to Baltimore’s
    claims for purposes of the nexus prong.
    a.
    First, we have little trouble concluding that the NEXCOM fuel supply agreements
    do not satisfy the “acting under” requirement. These agreements required Defendant Citgo
    to advertise, supply, and distribute gasoline and diesel to NEXCOM, which NEXCOM
    resold at a discount to “active duty military, retirees, reservists, and their families” at
    “service stations operated by NEXCOM on Navy bases located in a number of states across
    the country.” J.A. 216. Although Defendants contend that Citgo helped “the Government
    to produce an item that it needs” by selling NEXCOM fuel for resale on Navy bases, see
    Watson, 
    551 U.S. at 153
    , such logic would bring every seller of contracted goods and
    services within the ambit of § 1442 when the government is a customer.
    We refuse to adopt such a sweeping interpretation of Watson. In our view, the key
    lesson from Watson is that closely supervised government contractors are distinguishable
    from intensely regulated private firms because the former assist the government in carrying
    out basic governmental functions. See 
    551 U.S. at
    153–54 (“The assistance that private
    contractors provide federal officers goes beyond simple compliance with the law and helps
    77
    officers fulfill other basic governmental tasks. . . . [And they are tasks that] the
    Government itself would [otherwise] have . . . to perform.”). And the provision of means
    to engage in chemical warfare, as in Winters, or even the provision of specific component
    parts to be used aboard military vessels, as in Sawyer, is different in kind from the provision
    of motor vehicle fuel for resale on Navy bases—both in terms of the nature of the “item”
    provided and the level of supervision and control that is contemplated by the contract.
    To be sure, other circuits have applied the Watson dictum beyond the military-
    procurement-contract context, and we do not suggest that only defense contractors may
    invoke the federal officer removal statute. 20 Yet none of those cases have confronted a
    contract like the one we have here, which involves the sale of a standardized consumer
    product. Indeed, the Ninth Circuit has held, albeit in an unpublished decision, that the fact
    that the federal government purchases “off-the-shelf” products from a manufacturer “does
    not show that the federal government [has] supervised [the] manufacture of [such products]
    or directed [that they be] produce[d] in a particular manner, so as to come within the
    meaning of ‘act[ed] under.’” Washington v. Monsanto Co., 738 F. App’x 554, 555 (9th
    Cir. 2018) (sixth alteration in original) (quoting 
    28 U.S.C. § 1442
    (a)(1)).
    Although Defendants strongly resist the off-the-shelf-products analogy by pointing
    to particular provisions in the fuel supply agreements, we find those provisions unavailing.
    20
    For cases involving people other than defense contractors, see, for example, Goncalves
    ex rel. Goncalves v. Rady Child.’s Hosp. San Diego, 
    865 F.3d 1237
    , 1245–49 (9th Cir.
    2017); In re Commonwealth’s Motion to Appoint Couns. Against or Directed to Def. Ass’n
    of Phila., 
    790 F.3d 457
    , 469 (3d Cir. 2015); Bell v. Thornburg, 
    743 F.3d 84
    , 89 (5th Cir.
    2014); Jacks v. Meridian Res. Co., LLC, 
    701 F.3d 1224
    , 1232–35 (8th Cir. 2012); and
    Bennett v. MIS Corp., 
    607 F.3d 1076
    , 1088 (6th Cir. 2010).
    78
    Defendants emphasize that the agreements: (1) “set forth detailed ‘fuel specifications’ that
    required compliance with specified American Society for Testing and Materials standards,
    and compelled NEXCOM to ‘have a qualified independent source analyze the products’
    for compliance with those specifications”; (2) “authorized the Contracting Officer to
    inspect delivery, site, and operations”; and (3) “established detailed branding and
    advertising requirements.” Defs.’ Reply Br. 19–20 (footnotes omitted). But we have
    reviewed the contractual provisions cited by Defendants, and they are a far cry from the
    type of close supervision that existed in both Sawyer and Winters. See Sawyer, 860 F.3d
    at 253 (noting that the Navy provided “highly detailed ship [and military] specifications”
    that boilers were required to match and exercised “intense direction and control . . . over
    all written documentation to be delivered with its naval boilers,” including warnings);
    Winters, 
    149 F.3d at
    398–99 (noting that the Department of Defense required Dow
    Chemical to provide Agent Orange under threat of criminal sanctions, maintained strict
    control over the chemical’s development, and required that it be produced according to its
    specifications); cf. Isaacson v. Dow Chem. Co., 
    517 F.3d 129
    , 138 (2d Cir. 2008) (rejecting
    “off-the-shelf argument” because “commercially available products did not contain the
    Agent Orange herbicides in a concentration as high as that found in Agent Orange”).
    Rather, the cited provisions seem typical of any commercial contract. They are incidental
    to sale and sound in quality assurance. 21
    21
    In light of the misleading-marketing allegations that are at the center of Baltimore’s
    Complaint, we pause to note that the “detailed branding and advertising requirements”
    cited by Defendants have absolutely nothing to do with those allegations. They simply
    (Continued)
    79
    b.
    Next up are the oil and gas leases. Defendants allege that Chevron and “other
    Defendants” have extracted oil and gas on the federal OCS pursuant to a leasing program
    administered by the Secretary of the Interior under the OCSLA. J.A. 212; see, e.g., J.A.
    233–39 (boilerplate lease); see also Ctr. for Sustainable Econ. v. Jewell, 
    779 F.3d 588
    , 592
    (D.C. Cir. 2015) (“The [OCSLA] created a framework to facilitate the orderly and
    environmentally responsible exploration and extraction of oil and gas deposits on the OCS.
    It charges the Secretary of the Interior with preparing a program every five years containing
    a schedule of proposed leases for OCS resource exploration and development.”).
    The leases grant lessees “the exclusive right and privilege to drill for, develop, and
    produce oil and gas resources” in the submerged lands of the OCS in exchange for certain
    royalties on production, see J.A. 233–34, and requires them to exercise diligence in the
    development of the leased area by engaging in exploration, development, and production
    activities in accordance with government-approved plans, see J.A. 234; see also 
    30 C.F.R. §§ 550.200
    –.299 (expounding plans referenced in lease). The leases also place certain
    conditions on the disposition of oil and gas that is produced. Defendants highlight two
    such conditions. The first mandates that twenty percent of production be offered to “small
    or independent refiners.” J.A. 235. The second gives the government a right of first refusal
    address whether and when the government will market a branded product under a
    contractor’s brand or trade name. See Exs. F and G to Decl. of Arnold Walton, Mayor &
    City Council of Balt. v. BP P.L.C., 
    388 F. Supp. 3d 538
     (D. Md. 2019) (No. 1:18-cv-02357-
    ELH), ECF Nos. 127-6 at 23, 127-7 at 15).
    80
    to purchase all production “[i]n time of war or when the President of the United States shall
    so prescribe.” J.A. 235.
    Defendants argue that the foregoing provisions demonstrate that the Defendant
    lessees were “acting under” the Secretary of the Interior in extracting, producing, and
    selling fossil-fuel products on the OCS. We disagree.
    For starters, we note that many of lease terms are mere iterations of the OCSLA’s
    regulatory requirements.     Though OCS resource development is highly regulated,
    “differences in the degree of regulatory detail or supervision cannot by themselves
    transform . . . regulatory compliance into the kind of assistance” that triggers the “acting
    under” relationship. See Watson, 
    551 U.S. at 157
    . Of course, the presence of a contractual
    relationship (here, a lease) is an important distinction. But we are skeptical that the
    willingness to lease federal property or mineral rights to a private entity for the entity’s
    own commercial purposes, without more, could ever be characterized as the type of
    assistance that is required to trigger the government-contractor analogy. See, e.g., Bd. of
    Cnty. Comm’rs of Boulder Cnty. v. Suncor Energy (U.S.A.) Inc., 
    405 F. Supp. 3d 947
    , 977
    (D. Colo. 2019) (“At most, the leases appear to represent arms-length commercial
    transactions whereby ExxonMobil agreed to certain terms (that are not in issue in this case)
    in exchange for the right to use government-owned land for their own commercial
    purposes.”), aff’d, 25 F.4th at 1250–54.
    Moreover, we need not decide whether the OCSLA leases are distinguishable from
    other more run-of-the-mill natural-resources leases because they implicate national energy
    needs. Either way, we are not convinced that the supervision and control to which OCSLA
    81
    lessees are subject connote the sort of “unusually close” relationship that courts have
    previously recognized as supporting federal officer removal. See Watson, 
    551 U.S. at
    153–
    54; see also supra Part IV.H.1 (discussing Winters and Sawyer). As Baltimore points out,
    the leases do not appear to dictate that Defendants “extract fossil fuels in a particular
    manner.” Baltimore’s Resp. Br. 18. Nor do they appear to vest the government with
    control over “the composition of oil or gas to be refined and sold to third parties,” let alone
    purport to affect “the content or methods of Defendants’ communications with customers,
    consumers, and others about Defendants’ [fossil-fuel] products.” Id.; accord Suncor
    Energy, 405 F. Supp. 3d at 976–77. 22
    Finally, even to the extent that the OCSLA leases toe the “acting under” line, we
    still agree with the district court’s analysis as to § 1442’s third prong. Any connection
    between fossil-fuel production on the OCS and the conduct alleged in the Complaint is
    simply too remote.
    To satisfy the third prong, the conduct charged in the Complaint need only “relate
    to” the asserted official authority. See Sawyer, 860 F.3d at 257–58; see also 
    28 U.S.C. § 1442
    (a)(1) (“for or relating to any act under color of such office” (emphasis added)).
    22
    Defendants do not seriously contend otherwise. Instead, in their documents here and
    below, they repeatedly point to the same lease provisions that we cite above, without
    further explanation. This is a complex case, and we do not intend to suggest that
    Defendants were required to outline the leases’ requirements in painstaking detail in order
    to satisfy their burden of justifying federal officer removal. But they must provide
    “‘candid, specific and positive’ allegations that they were acting under federal officers.”
    In re MTBE, 
    488 F.3d at 130
     (citation omitted) (quoting Willingham v. Morgan, 
    395 U.S. 402
    , 408 (1969)). Here, the lack of any specificity as to federal direction leaves us unable
    to conclude that the leases rise to the level of an unusually close relationship, as required
    by the first “acting under” prong.
    82
    That is, there must be “a connection or association between the act in question and the
    federal office.” Sawyer, 860 F.3d at 258 (emphasis omitted) (quoting Papp v. Fore-Kast
    Sales Co., 
    842 F.3d 805
    , 813 (3d Cir. 2016)). We elaborated upon this requirement in
    Sawyer. There, we held that the district court imposed “a stricter standard of causation
    than that recognized by the statute” by demanding a showing of “specific government
    direction” as to whether the defendant manufacturer should have warned shipyard workers
    who assembled boilers for use aboard naval vessels about the dangers of asbestos, which
    was a component of the boilers manufactured by the defendant under a contract with the
    Navy. See id. at 252, 258. Notably, the Navy required the use of asbestos in boilers despite
    its known dangers and dictated the content of the warnings that accompanied the boilers.
    The defendant manufacturer complied with those requirements.                Accordingly, we
    concluded that the defendant’s performance of the contract was “sufficient to connect the
    plaintiffs’ claims, which fault[ed] warnings that were not specified by the Navy, to the
    warnings that the Navy specified and with which [the defendant] complied.” Id. at 258
    (emphasis added); see also id. (“These claims undoubtedly ‘relat[e] to’ all warnings, given
    or not, that the Navy determined in its discretion.” (alteration in original)).
    In this case, the district court held that even if the “acting under” and “colorable
    federal defense” requirements were satisfied, Defendants did not plausibly assert that the
    charged conduct was carried out “for or relating to” the alleged official authority, given the
    “wide array of conduct” for which they were sued. See BP P.L.C., 388 F. Supp. 3d at 568–
    69. Specifically, the court explained that Defendants were sued “for their contribution to
    climate change by producing, promoting, selling, and concealing the dangers of fossil[-
    83
    ]fuel products,” and yet failed to show that a federal officer “controlled their total
    production and sales of fossil fuels,” or “directed them to conceal the hazards of fossil fuels
    or prohibited them from providing warnings to consumers.” Id. at 568.
    On appeal, Defendants take issue with primarily two aspects of the district court’s
    analysis. First, they argue that the lack of direction as to concealment or warnings is
    irrelevant to some of Baltimore’s claims, namely, strict liability for design defect. Second,
    they contend that a lack of control as to total production and sales is not dispositive under
    Sawyer’s relaxed reading of the third “nexus” prong.
    We disagree with Defendants on both fronts. When read as a whole, the Complaint
    clearly seeks to challenge the promotion and sale of fossil-fuel products without warning
    and abetted by a sophisticated disinformation campaign. Of course, there are many
    references to fossil-fuel production in the Complaint, which spans 132 pages. But, by and
    large, these references only serve to tell a broader story about how the unrestrained
    production and use of Defendants’ fossil-fuel products contribute to greenhouse gas
    pollution. Although this story is necessary to establish the avenue of Baltimore’s climate-
    change-related injuries, it is not the source of tort liability. Put differently, Baltimore does
    not merely allege that Defendants contributed to climate change and its attendant harms by
    producing and selling fossil-fuel products; it is the concealment and misrepresentation of
    the products’ known dangers—and the simultaneous promotion of their unrestrained use—
    84
    that allegedly drove consumption, and thus greenhouse gas pollution, and thus climate
    change. 23
    For this reason, the lack of federal control over the production and sale of all fossil-
    fuel products is relevant to the nexus analysis, and the district court did not err in relying
    upon that fact when finding that any connection between the charged conduct and the
    asserted official authority was even further diminished. If production and sales went to the
    heart of Baltimore’s claims, we might be inclined to think otherwise. After all, the alleged
    government-directed conduct (here, the production and sale of fossil fuels extracted on the
    23
    The same holds true for Baltimore’s strict-liability design-defect claim. As Defendants
    point out, design-defect claims generally focus on “the product itself,” rather than “the
    conduct of the manufacturer.” Phipps v. Gen. Motors Corp., 
    363 A.2d 955
    , 958 (Md.
    1976). But that is not how Baltimore has framed its claim. Instead, Baltimore relies on
    the same misleading-marketing and denialist-campaign allegations cited above, averring
    that Defendants not only failed to warn the public about the climate effects they knew
    would result from the normal use of their products, but also took affirmative steps to
    misrepresent the nature of those risks, such as by disseminating information aimed at
    casting doubt on the integrity of scientific evidence that was generally accepted at the time
    and by advancing their own pseudo-scientific theories. According to Baltimore, these
    tactics “prevented reasonable consumers from forming an expectation that fossil-fuel
    products would cause grave climate changes.” J.A. 161; see also Maryland v. Exxon Mobil
    Corp., 
    406 F. Supp. 3d 420
    , 461 (D. Md. 2019) (explaining that Maryland applies a
    consumer-expectation test in design-defect cases, and only applies the risk-utility test when
    the product malfunctions in some way (citing Halliday v. Sturm, Ruger & Co., 
    792 A.2d 1145
     (Md. 2002)). Under Baltimore’s own theory of liability, then, its design-defect claim
    hinges on its ability to demonstrate that Defendants’ promotional efforts deprived
    reasonable consumers of the ability to form expectations that they would have otherwise
    formed. Though we agree with Defendants that Baltimore’s theory appears to be a novel
    one, at least in the design-defect context, this may be a function of the unique circumstances
    that have allegedly given rise to this litigation. For our purposes, it is sufficient that
    Baltimore has limited its design-defect theory to one that turns on the promotion
    allegations, which have nothing to do with the action purportedly taken under federal
    authority. The viability of such a theory under Maryland law is a question for the Maryland
    courts to decide.
    85
    OCS) need only “relate to” the conduct charged in the Complaint. But given the foregoing
    allegations, we agree with the district court’s conclusion that the relationship between
    Baltimore’s claims and any federal authority over a portion of certain Defendants’
    production and sale of fossil-fuel products is too tenuous to support removal under § 1442.
    In sum, we hold that the Defendants who participated in the OCSLA leasing
    program were not “acting under” federal officials in extracting and producing fossil fuels
    on the OCS, and any connection between such activity and Baltimore’s claims is too
    attenuated in any event.
    c.
    That leaves the 1944 unit agreement governing the operation of the Elk Hills
    Reserve. Because the agreement has a complicated history, we begin with its origin and
    purpose, followed by a general overview of its terms (or at least those in dispute). In the
    end, however, we decline to pass on the question of whether it satisfies the “acting under”
    prong. Like the OCSLA leases, we hold that the agreement fails to meet the third prong.
    i.
    The Elk Hills Reserve is located in Kern County, California, and originated from a
    1912 Executive Order.
    At the turn of the [twentieth] century, Government lands in the West were
    rapidly being turned over to private ownership. At the same time, there was
    a growing realization of the importance of oil for the Navy, which was then
    changing its ships from coal to oil burning. In response to arguments that the
    Government should preserve oil for Naval purposes, President Taft withdrew
    large portions of land in California and Wyoming from eligibility for private
    86
    ownership, and in 1912 set aside [the Elk Hills Reserve] by an Executive
    Order. . . .
    The establishment of the Reserve was expressly made subject to pre-existing
    private ownership. There are approximately 46,000 acres within the Reserve,
    approximately one-fifth [was] owned by [the Standard Oil Company of
    California] and the remainder, approximately four-fifths by Navy. The
    Standard lands [were] not in one block, but [were] checker-boarded
    throughout the Reserve. The Executive Order establishing the Reserve
    affected the Government lands in the field as far as future use and disposition
    were concerned, but it had no effect on the privately owned lands, and the
    owners of those lands were free to use and dispose of them as they saw fit.
    United States v. Standard Oil Co., 
    545 F.2d 624
    , 626–27 (9th Cir. 1976). 24
    Because production from one part of the Elk Hills Reserve could have reduced the
    amount of oil underlying another part of the Reserve, the Navy and Standard Oil (a Chevron
    predecessor) initially “had an understanding to the effect that neither would drill
    wells . . . without six months’ notice to the other.” 
    Id. at 627
    ; see also 
    id.
     (explaining that
    underlying both parties’ lands were “separate accumulations of hydrocarbons,” which,
    “unlike solid minerals, do not remain in place but move because of changes in underground
    pressure and [thus] move toward producing wells”). But the tension between Standard’s
    legitimate goal of producing oil on its land and the Navy’s duty to conserve its
    hydrocarbons in the ground until needed in an emergency became untenable on the brink
    of World War II. So the parties began negotiations over “an exchange, purchase or
    condemnation of Standard’s land in the Reserve on the one hand, or their operation as a
    unit with the Navy land,” on the other. 
    Id.
    24
    Standard Oil involved a prior dispute over the same agreement, in which the Ninth
    Circuit endorsed the foregoing summary agreed upon by the parties in a pretrial statement.
    87
    These negotiations ultimately resulted in the 1944 Unit Plan Contract (“UPC”). 25 A
    “unit agreement” is “a common arrangement in the petroleum industry where two or more
    owners have interests in a common pool,” which is operated as a “unit.” 
    Id.
     The parties
    share production and costs in agreed-upon proportions, and, ordinarily, the objective is “to
    produce currently, at minimum expense and pursuant to good engineering practices.” 
    Id.
    The UPC involved here, however, was unique in that “its purpose was not to produce
    currently, and its effect was to conserve as much of the hydrocarbons in place as was
    feasible until needed for an emergency.” 
    Id.
     “This required curtailing production of
    Standard’s hydrocarbons along with that of Navy, for which Standard would have to
    receive compensation.” 
    Id.
     Accordingly, “in consideration for Standard curtailing its
    production plus giving up certain other rights,” 
    id.
     at 627–28, the UPC gave Standard the
    right to take specified volumes of oil from certain zones in the pool—namely, an average
    of 15,000 barrels per day, or a lesser amount fixed by the Secretary of the Navy, with (1) a
    ceiling of 25,000,000 barrels or one-third of Standard’s total share, whichever was less,
    and (2) a floor of an amount sufficient to cover Standard’s out-of-pocket expenses in
    maintaining the Reserve in good oil-field condition, see 
    id. at 628
    ; J.A. 245–46, 250–52.
    25
    The parties entered into an earlier contract in 1942, but it was voluntarily terminated in
    1943 due to doubts expressed by the Attorney General as to its legality. 
    Id.
     The parties
    entered into the UPC in 1944, after Congress passed enabling legislation. See 
    id.
     The UPC
    governed the joint operation and development of three initial “commercially productive
    zones” underlying the Elk Hills Reserve, two of which contained oil (the Stevens Zone and
    Shallow Oil Zone). Only the latter zone is at issue here, and all of the provisions discussed
    in this opinion pertain to that zone.
    88
    ii.
    With this background in mind, we turn to the specific UPC provisions relied upon
    by Defendants to establish that one of their predecessors (Standard) “acted under” the Navy
    when it engaged in fossil-fuel production during the twentieth century.
    In the main, Defendants stress that the UPC gave the Navy “exclusive control over
    the exploration, prospecting, development, and operation of the [Elk Hills] Reserve,” and
    the “full and absolute power to determine . . . the quantity and rate of production from[]
    the Reserve.” Defs.’ Reply Br. 18 (second alteration in original) (citation omitted); accord
    J.A. 249–50. In particular, they note that the UPC “obligated” Standard “to operate the
    Reserve in such manner as to produce ‘not less than 15,000 barrels of oil per day,’” and
    allowed the Navy to suspend or increase the rate of production in its “discretion.” Defs.’
    Reply Br. 18–19 (quoting J.A. 250) (citing J.A. 250–51).
    Baltimore counters that these provisions do not establish that Standard was
    producing oil at the direction of a federal officer. According to Baltimore, these provisions
    merely required that the pool be maintained in a manner that would have made it capable
    of producing at least 15,000 barrels per day until Standard received its share under the
    contract. See J.A. 250 (“Until Standard shall have received . . . its share of production . . . ,
    the Reserve shall be developed and operated in such manner and to such extent as will, so
    far as practicable, permit production . . . to be maintained at a rate sufficient to produce
    therefrom not less than 15,000 barrels of oil per day . . . .”). As a result, Baltimore argues
    that Standard could have complied with the contract by producing no oil at all, unless and
    89
    until the Navy elected to increase the rate of production via congressional authorization. 26
    And even then, Baltimore says, the contract did not necessarily make Standard responsible
    for production on the Navy’s behalf. See generally J.A. 249 (“Navy shall, subject to the
    provisions hereof, have the exclusive control over the exploration, prospecting,
    development, and operation of the Reserve, and Navy may, in its discretion, explore,
    prospect, develop, and/or operate the Reserve directly with its own personnel or it may
    contract for all or any part of such [activities] with competent and responsible parties[,
    including] . . . Standard . . . .” (emphasis added)).
    At our first oral argument, Defendants shifted their focus away from whether the
    15,000-barrels-per-day provision actually required Standard to produce any oil, as they
    argued in their briefs. Instead, Defendants pointed to the Naval Petroleum Reserves
    Production Act of 1976 (“1976 Act”), which “authorized and directed” the Secretary of the
    Navy to produce the Elk Hills Reserve “at the maximum efficient rate consistent with
    sound engineering practices for a period not to exceed six years . . . .” Naval Petroleum
    Reserves Production Act, Pub. L. No. 94-258, § 201(3), 
    90 Stat. 303
    , 308 (1976); see also
    supra note 26 (discussing UPC’s congressional-authorization requirement). Congress
    26
    See generally J.A. 246 (“[The UPC] does not and cannot, in and of itself, authorize the
    production of any of Navy’s share of the oil, . . . as distinct from that portion of Standard’s
    share hereinafter permitted to be produced and received by Standard under the terms of
    [the above-cited provisions]. The production of the remainder of Standard’s share and of
    all of Navy’s share must, except for the purpose of protecting, conserving, maintaining, or
    testing the Reserve, be preceded by and based upon [congressional] authorization . . .; and
    references hereinafter to an authorization or election by Navy to order the production of
    any such oil are intended to be limited to action by the Navy within the terms of any such
    [authorization].”).
    90
    authorized this increase in production after determining that “the Navy’s intent to maintain
    a petroleum reserve, in case of national emergency in 1944, was no longer relevant,”
    Chevron U.S.A., Inc. v. United States, 
    71 Fed. Cl. 236
    , 244 (2006), and in response to the
    1973 oil crisis, J.A. 214. The 1976 Act also gave the Secretary the authority “to sell or
    otherwise dispose of the United States share of such petroleum produced from” the Elk
    Hills Reserve. See 90 Stat. at 308.
    Shortly thereafter, in 1977, Congress transferred authority over the Elk Hills
    Reserve to the Department of Energy and assigned to it the Navy’s interest in the Reserve
    as well as the UPC. Chevron, 71 Fed. Cl. at 244–45. Standard, and later Chevron as a
    successor, “continued its interest in the joint operation” of the Reserve until 1997. J.A.
    214.
    iii.
    The parties’ dispute about the UPC and its significance for purposes of federal
    officer removal thus can be distilled to two main issues. First, was any oil ever produced
    from the Elk Hills Reserve at the Navy’s direction? And second, if so, was it Standard
    who carried out those orders?
    In light of the 1976 Act, we think the answer to the first question is yes. But as to
    the second, we simply have no idea whether production authorized by Congress was carried
    out by Standard. At our first oral argument, counsel for Chevron merely stated that it was
    his “understanding” that Standard extracted oil on the Navy’s behalf under the unit
    agreement, and, more generally, that the government relies upon private companies
    91
    because it does not have its own oil and gas engineers or drilling equipment. And although
    counsel later submitted a Rule 28(j) letter stating that the government had final authority
    over all production, “which was carried out by Standard, and later Chevron,” Defs.’ Letter
    of Suppl. Authorities 1, ECF No. 133, the letter merely cites the UPC as a whole in support
    of this assertion. In other words, it does not explain why Baltimore’s reliance on the
    operational-control provision cited above is misplaced, see J.A. 249, nor does it point to
    any other provision or provisions that support a different reading. 27 Thus, we are left
    wanting for pertinent details about Standard’s role in operating the Elk Hills Reserve and
    producing oil therefrom on behalf of the Navy, which might bear directly upon the “acting
    under” analysis. Indeed, if Standard was not responsible for producing the oil authorized
    by Congress in 1976, the upshot is that any extensive government control contemplated by
    the UPC only affected the parties’ relative shares and the development of the Reserve, not
    Standard’s duties with respect to any production carried out for the Navy’s benefit.
    Nevertheless, even if we were to conclude that Standard was responsible for such
    production under the UPC—and that this responsibility transformed Standard into a person
    “acting under” the Navy for purposes of § 1442—the production of oil from the Elk Hills
    Reserve by the predecessor of one of the twenty-six Defendants, like the production of
    fossil fuels on the OCS, is not sufficiently “related” to Baltimore’s claims. See supra Part
    27
    Because Baltimore only claimed that Standard was not responsible for production at oral
    argument—in response to Defendants’ reliance on the 1976 Act, which Defendants, in turn,
    did not rely upon in their briefs on appeal—this issue is not addressed in Defendants’
    briefing, either. Nor can we find any relevant explanation in the federal-officer allegations
    in the Notice of Removal.
    92
    IV.H.2.b. Accordingly, the district court was correct in concluding that the UPC cannot
    support federal officer removal in this case.
    V.
    The impacts of climate change undoubtably have local, national, and international
    ramifications. See Massachusetts, 549 U.S at 521–53 (noting that the harms associated
    with climate change are “serious and well recognized”). But those consequences do not
    necessarily confer jurisdiction upon federal courts carte blanche.          In this case, a
    municipality has decided to exclusively rely upon state-law claims to remedy its own
    climate-change injuries, which it perceives were caused, at least in part, by Defendants’
    fossil-fuel products and strategic misinformation campaign. These claims do not belong
    in federal court. Given the jurisdictional inquiry before us, we take no view on whether
    Baltimore will ultimately fail or succeed in proving its claims under Maryland law. We
    cannot decide those questions. But we are confident that Maryland courts can capably
    adjudicate claims arising under their own laws that fail to otherwise provide any federal
    jurisdiction. Because we do not discern a proper basis for removal that permits a federal
    court to entertain Baltimore’s action, the district court’s order granting Baltimore’s Motion
    to Remand is
    AFFIRMED.
    93
    

Document Info

Docket Number: 19-1644

Filed Date: 4/7/2022

Precedential Status: Precedential

Modified Date: 4/13/2022

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