The Supreme Court heard oral arguments in Suncor v. Boulder, a case determining whether federal law preempts state and local governments from suing fossil fuel companies under state tort laws for climate-related damages. The litigation centers on whether cities and states can recover costs for climate harms linked to emissions that originate outside their borders. Energy policy experts and industry advocates argue that a ruling favoring the plaintiffs could lead to widespread litigation, potential bankruptcies among energy firms, and increased costs for consumers.
What the Right Is Saying
Industry groups and conservative legal analysts warn that allowing these suits to proceed could destabilize the energy sector and impose heavy costs on American households. Jason Isaac, CEO of the American Energy Institute, described the potential outcome as a "mass exodus" of energy companies, leading to fuel scarcity and higher prices. "That's really what this is about. It's about controlling these companies and stopping the use of hydrocarbons," Isaac said. He argued that a ruling in favor of Boulder could open "Pandora's box," enabling thousands of jurisdictions to sue energy companies, with defense costs driving up consumer prices.
O.H. Skinner, executive director of the Alliance for Consumers, characterized the lawsuits as a "backdoor carbon tax" intended to achieve through the courts what advocates have failed to pass in Congress. Skinner noted that the legal theory could extend liability beyond oil producers to any business contributing to emissions, including retailers, automakers, and utilities. "To the left, climate change is everything and everything is climate change," Skinner said. "So it's very hard to find a line for who isn't contributing to climate change." Justice Clarence Thomas echoed these concerns during arguments, pressing Boulder’s counsel on whether the theory could expose large retailers to similar lawsuits, to which Russell acknowledged that nothing in their theory explicitly prevents it, though state law limitations might apply.
What the Left Is Saying
Representatives for Boulder, Colorado, and other municipalities argue that state tort law provides a necessary mechanism for local communities to seek redress for damages they suffer due to corporate negligence. Kevin Russell, attorney for Boulder, stated that the legal theory is grounded in longstanding state authority to provide remedies for injuries occurring within their borders, even if the conduct causing the injury happened elsewhere. "Since the founding, states have had the power to provide tort remedies for injuries occurring within their borders," Russell told the justices.
The lawsuit, filed in 2018 against ExxonMobil and Suncor Energy, alleges that the companies knowingly contributed to climate change while misleading the public about the risks of fossil fuels. The complaint cites a 1977 internal ExxonMobil memo circulated among high-level managers, which reportedly stated that "current scientific opinion overwhelmingly favors" the view that fossil fuels contribute to rising CO2 emissions. While former counsel David Bookbinder previously described the strategy as a way to implement an "indirect carbon tax," Boulder maintains that the case is not an attempt to set national climate policy but to hold specific companies accountable under existing state laws.
What the Numbers Show
The case before the Supreme Court is one of approximately 30 similar climate liability lawsuits currently pending in various jurisdictions across the United States, including cases in Portland and Baltimore. Justice Samuel Alito has recused himself from the case without providing a reason. During oral arguments, Justice Brett Kavanaugh raised concerns about the financial scale of such litigation, warning that a wave of lawsuits could potentially "bankrupt" defendants. Jason Isaac estimated that there are over 90,000 levels of government entities in the United States that could potentially initiate similar lawsuits against energy companies if the Supreme Court rules in favor of the plaintiffs. A 4-4 split among the justices would leave the lower court's ruling in place without establishing nationwide precedent, though Isaac noted the practical effect could still encourage further litigation.
The Bottom Line
The Supreme Court’s decision in Suncor v. Boulder will determine the viability of state and local climate liability lawsuits as a legal strategy. If the justices rule that federal law does not preempt these state tort claims, it could trigger a surge of litigation against fossil fuel companies and potentially other industries, altering the legal landscape for environmental damages. Conversely, a ruling for the energy companies would likely block these specific avenues for recovering climate-related costs at the local level. The outcome may also influence future legislative efforts on carbon pricing and energy regulation, as the judiciary defines the boundary between national environmental policy and local tort remedies.