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US Supreme Court will hear Exxon's and Suncor's bid to dismiss Boulder's climate lawsuit

The U.S. Supreme Court has agreed to hear ExxonMobil and Suncor Energy's bid to quash a lawsuit filed by Boulder, Colorado officials who want to hold oil companies responsible for climate change.

The Supreme Court heard an appeal from the companies against a ruling of the lower court that allowed the lawsuit to proceed. The lawsuit alleging violations of state law by the companies seeks unspecified damages for "costs incurred" by Boulder in mitigating climate change.

Boulder is just one of the dozens of climate-related cases filed by U.S. states against companies that produce, extract, distribute, or sell fossil fuels.

Burning fossil fuels releases greenhouse gasses such as carbon dioxide, which traps more heat from the sun, leading to an increase in global temperatures over time.

In their lawsuit filed in 2018, Boulder officials accused Exxon, based in the U.S. and Suncor, based out of Canada, of misleading the public regarding the role their products played on climate change. They also claimed that they were profiting off unchecked sales of fossil fuels. The companies deny any wrongdoing.

Plaintiffs claim that oil companies must cover the costs of past and future actions taken by city and county governments to reduce the impact of climate change. They cite infrastructure repairs, environmental damages, emergency management, and harms caused to public health.

The companies asked lower courts to dismiss this case. They argued, among other things, that Boulder's lawsuit would interfere illegally with federal regulations of greenhouse gas emission under the?Clean Air Act?.

In May 2025, the Colorado Supreme Court denied their request. This prompted an appeal to the U.S. Supreme Court.

The Trump administration has backed the appeal of the oil companies.

The Supreme Court rejected a similar request by Sunoco, and other oil companies, to dismiss a climate-related suit by Honolulu. Hawaii's highest court had allowed the case to proceed.

The lawsuit aims to hold the companies responsible for their alleged role in contributing to extreme weather in the region as well as an increase in the average sea-level along the Honolulu Pacific coast, which is linked to flooding and erosion.

(source: Reuters)