The nation’s highest court announced Monday it will examine an effort by major oil corporations ExxonMobil and Suncor Energy to dismiss a climate-focused legal action filed by Boulder, Colorado authorities.
The Supreme Court justices will review the companies’ challenge to a previous court decision that allowed the case to proceed. Boulder’s lawsuit claims the corporations violated state laws and demands monetary compensation for expenses the city has faced while addressing climate change impacts.
This legal battle represents just one among many similar climate-focused cases that American local governments have initiated against businesses involved in extracting, manufacturing, distributing or marketing fossil fuel products.
When fossil fuels are burned, they emit greenhouse gases like carbon dioxide into the air, which trap more solar energy and gradually increase Earth’s average temperatures.
Boulder officials filed their 2018 legal action claiming that American-based Exxon and Canadian-based Suncor deceived the public regarding how their products contributed to worsening climate conditions while generating profits from unrestricted fossil fuel commerce. Both corporations reject any wrongdoing.
City and county representatives have stated the petroleum companies should pay for previous and upcoming expenses related to climate impact reduction efforts, including infrastructure maintenance, environmental harm remediation, emergency response operations and public health protection measures.
The corporations asked lower courts to throw out the case, contending that Boulder’s legal action would unlawfully disrupt federal oversight of greenhouse gas emissions under Clean Air Act regulations.
Colorado’s highest court rejected their dismissal request in May 2025, leading to the current Supreme Court appeal.
The Trump administration has supported the oil companies’ appeal effort.
The Supreme Court previously declined to hear a comparable attempt by Sunoco and other petroleum corporations to eliminate a climate-related case from Honolulu after Hawaii’s supreme court permitted it to continue.
The Hawaiian lawsuit aims to hold the companies responsible for their suspected contribution to severe weather impacting the area, plus substantial sea level increases along Honolulu’s Pacific shores, which has caused flooding, coastal erosion and beach destruction.
