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Supreme Court weighs state climate suits against oil majors

10/11/2026

The Supreme Court heard arguments in Suncor v. Boulder, a case determining whether federal law prevents municipalities from suing fossil fuel companies under state tort law for alleged climate damages.

The dispute centers on whether states like Colorado can hold oil producers accountable for emissions that cross state and national borders, or if such matters fall exclusively under federal jurisdiction.

The city and county of Boulder, Colo., filed the lawsuit against ExxonMobil and Suncor Energy in 2018.

The municipalities accuse the companies of knowingly contributing to climate change while misleading the public about the dangers of fossil fuels.

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