The Supreme Court opened its new term with a two-hour oral argument questioning whether federal or state courts should adjudicate civil lawsuits against energy companies for alleged climate change harms. Eight justices participated in the session, which featured a recusal by Justice Samuel Alito due to his ownership of stock in oil companies. The case, Suncor Energy Inc. v. Commissioners of Boulder County, CO, centers on whether local and state governments can seek billions of dollars in damages for rebuilding costs associated with wildfires, rising sea levels, and severe storms attributed to fossil fuel pollution.

Local officials argue that financial penalties are necessary to mitigate ongoing community harms, including recent forest fires and worsening air pollution. They claim the energy firms misled the public regarding their role in climate change. Among the defendants are Suncor, a Canadian-based energy company operating the only major oil refinery in Colorado, and ExxonMobil, the largest oil company in the U.S. The Trump administration and the companies contend that emissions are a national issue that belongs in federal court, where similar suits have previously been dismissed. They argue that the Clean Air Act limits the regulatory authority of individual states and counties, describing the litigation as a local power grab on a global problem.

Chief Justice John Roberts appeared to lean toward allowing state jurisdiction, noting that the court has historically permitted similar claims to proceed in state venues despite conduct having broad effects across multiple states. Justice Elena Kagan compared the climate suits to previous claims against tobacco and opioid companies, questioning the principle that bars states from regulating air and water issues. Conversely, Justice Brett Kavanaugh expressed concern that such multi-jurisdictional litigation could bankrupt defendants and open the door for any manufacturer to be sued. He argued that Congress relied on federal precedents establishing pollution as a federal matter when enacting the Clean Air Act.

The court also faced a procedural question regarding its own jurisdiction. Justice Ketanji Brown Jackson asked whether the court should wait for state courts to resolve pending federal issues before addressing the merits of the case. This procedural exit ramp could delay a final decision on the federalism question. If the court rules 4-4 with Alito not participating, the specific lawsuit would proceed in state courts. A decision is expected by next spring.