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The Supreme Court should let Boulder’s climate lawsuit proceed

Colorado’s high court sent the case back for further proceedings in 2025; the Supreme Court is reviewing legal barriers, not whether the companies are liable.

Power Check · The Wells Post

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Courthouse exterior representing the Supreme Court's review of a climate lawsuit.

The Supreme Court of the United States begins its new term Monday with arguments scheduled in a case that could determine whether Boulder can pursue climate claims against Exxon Mobil and Suncor in state court. The justices should keep that route open: allowing a lawsuit to proceed is not a finding that its allegations are true.

Boulder County and the City of Boulder sued the fossil-fuel companies in 2018, alleging their conduct contributed to climate-related harms and seeking damages. The five state-law claims include nuisance, trespass, unjust enrichment and civil conspiracy, CBS News reported. The allegations remain unproven.

The Colorado Supreme Court ruled in May 2025 that federal law did not block the claims, then sent the case back for further proceedings. The U.S. Supreme Court is weighing whether federal law precludes Boulder’s claims and whether it has jurisdiction to review Colorado’s ruling—not whether Exxon or Suncor is liable.

Let Boulder try to prove its case

That distinction should guide the Court. A ruling that the case may continue would give Boulder a chance to present its allegations in court; it would not guarantee a damages award or require the companies to change emissions policy.

Jonathan Adler, a William & Mary law professor who filed a brief supporting Boulder, told CBS News: “This is not a judgment about whether these cases will succeed. It's a judgment about whether folks get to make their case”. That is the right way to understand the question before the justices.

For working people, the issue reaches beyond corporate accountability in the abstract. If a community can prove that companies contributed to local harms, a damages case could offer a way to seek compensation from those companies. If the legal route is closed before the evidence is tested, local governments have fewer options to press that claim, and their residents may have to contend with the consequences through public resources instead. The sources do not establish what Boulder’s damages might be, or whether the city and county will win.

The Court’s calendar lists the case for argument on Oct. 5, the first day of the term. The decision will also matter beyond Boulder: state and local governments have brought dozens of similar climate lawsuits, and a broad ruling against them could limit where those claims can be heard.

Exxon and Suncor argue that greenhouse-gas emissions cross state and national borders, so disputes over them belong under uniform federal rules. They warn that allowing many local lawsuits could create conflicting policies. The Trump administration supports the companies, as do West Virginia and 25 other states.

West Virginia Solicitor General Michael Williams told CBS News: “It's a national problem, so it requires a national solution”. That argument deserves a serious hearing: a patchwork of court rulings could raise difficult questions about who sets policy for emissions that cross borders.

But Boulder says its lawsuit concerns the companies’ alleged production and marketing conduct and the local harms it attributes to that conduct—not a court order imposing an emissions policy. That distinction does not establish that Boulder’s claims are right. It does explain why the Supreme Court should not treat the mere presence of a national climate problem as proof that local claims must be dismissed before they are tested.

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Congress can set broader limits if lawmakers decide those lawsuits should be restricted. Adler told CBS News that Congress could act. A decision with such far-reaching consequences should follow an open legislative debate and a public vote, not an implied barrier that prevents a community from trying to prove its case.

Keep the Court’s other cases in their lane

The term also includes separate challenges to state and local restrictions on AR-15-style firearms, scheduled for argument on Dec. 2, CBS News reported. Those disputes concern gun laws; they do not decide whether Boulder’s climate claims are precluded by federal law. The Court should address each case on its own legal record, rather than let the term’s broader fights blur the question in front of it now.

The immediate accountability test belongs to the justices: resolve the jurisdiction and preemption questions without treating a threshold appeal as a verdict on unproven allegations. They should leave Boulder’s claims available for further proceedings. If Congress wants a nationwide limit on lawsuits like this one, lawmakers should debate that change openly and take responsibility for it in a public vote.

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