SCOTUS to Rule on Boulder Climate Suit: A Watershed Moment for Big Oil Liability

The U.S. Supreme Court’s decision to hear the appeal in the Boulder climate lawsuit marks a critical juncture in the multi-year legal battle between local governments and the global fossil fuel industry. Originally filed in 2018 by the City of Boulder, Boulder County, and San Miguel County, the case targets energy giants ExxonMobil and Suncor Energy, alleging that their production and deceptive marketing of fossil fuels significantly contributed to climate change impacts within Colorado. The plaintiffs are seeking damages to cover the costs of infrastructure repairs and mitigation efforts related to extreme weather events, including devastating wildfires, floods, and heatwaves that have plagued the region over the last decade.

At the heart of this legal confrontation is a jurisdictional dispute that has broader implications for the American legal system. For years, energy companies have fought to move these types of climate-related lawsuits from state courts to federal courts. Their legal teams argue that climate change is a global phenomenon governed by federal law and international treaties, specifically citing the Clean Air Act as the primary regulatory framework that should displace state-level common law claims. Conversely, the Colorado municipalities contend that their claims are based on state-level consumer protection and public nuisance laws, which they argue should be adjudicated in state courts where they may find a more sympathetic jury and a different set of evidentiary standards.

The Supreme Court’s intervention follows a series of conflicting lower court rulings. In 2023, the 10th U.S. Circuit Court of Appeals ruled that the Boulder case should proceed in state court, a major victory for the plaintiffs. However, the energy companies appealed this decision to the Supreme Court, arguing that allowing a patchwork of state-level rulings on climate liability would create an unmanageable legal environment for the energy sector. By agreeing to hear the case, the conservative-leaning Supreme Court will now decide whether federal law preempts these state-level claims. A ruling in favor of the energy companies could effectively shut down dozens of similar lawsuits filed by cities and states across the country, including high-profile cases in California, Hawaii, and New York.