Supreme Court to Review Boulder’s Climate Lawsuit Against Energy Giants

Supreme Court weighs Boulder's climate lawsuit against Exxon and Suncor, testing state law vs. federal preemption.

October 4, 2026 One Min Read

POLICY WIRE — Washington, United States — The U.S. Supreme Court is set to hear a major case involving Boulder, Colorado’s effort to hold energy companies accountable for the impacts of climate change. This will be one of the first cases considered when the court resumes its term in late June.

The lawsuit, filed in 2018, targets Exxon Mobil and Suncor Energy, alleging that their actions have contributed to global warming, leading to extreme weather events and environmental damage in Boulder. The city seeks compensation for past and future harms linked to greenhouse gas emissions.

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The legal battle centers on whether the case can proceed under state law or if it is barred by federal regulations. The Supreme Court has also asked both sides to clarify its jurisdiction over the Colorado Supreme Court’s decision. With Justice Samuel Alito recusing himself, the outcome could result in a 4-4 split, leaving the lower court’s ruling intact.

Reporting by Policy-Wire (PW)

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