Supreme Court justices heard oral arguments in Boulder County's climate lawsuit against Suncor, and several conservative justices signaled skepticism. The case tests whether state tort law can hold energy companies liable for global emissions that cause local harm. Suncor's lawyer warned that allowing the case would let roughly 90,000 municipalities set national energy policy through jury verdicts. Justice Kavanaugh cited a wall of precedent that treats interstate pollution as a federal matter. A decision is expected by June 2027 and could affect more than 60 similar lawsuits. The case also drew attention because Boulder's former lawyer called tort liability an indirect carbon tax, which some see as an admission that litigation is a workaround for the lack of federal carbon pricing. The justices' questions focused on whether state law can apply to worldwide conduct, and whether climate policy belongs in courts or in the political branches. The ruling will likely shape how local governments pursue climate action going forward.
