The Supreme Court on Monday heard oral arguments in Suncor v. Boulder, a case that could reshape how states hold oil companies accountable for climate change. At issue is whether Colorado can use its own tort laws to seek damages from Suncor Energy for alleged harms caused by emissions occurring outside the state, or whether federal law preempts such claims. The justices also weighed whether the Court has jurisdiction to hear the case now, given that it remains pending before the Colorado Supreme Court.
Justices Ketanji Brown Jackson and Sonia Sotomayor repeatedly pressed attorneys on jurisdictional questions, prompting conservative legal observers to suggest the liberal justices were seeking an off-ramp. «Jackson and Sotomayor were looking for an escape hatch,» said Carrie Severino, president of JCN, a conservative judicial group. Jackson called the dispute «premature from the standpoint of this court exercising its jurisdiction» and questioned whether the Court had enough facts to rule. Sotomayor proposed sending the case back to the Colorado Supreme Court, stating, «We have to be sure of our jurisdiction before we take it.»
Conservative attorneys argued that the liberal justices' focus on jurisdiction signals they fear being outvoted on the central question of whether the Clean Air Act preempts state claims. «The questions by Jackson and Sotomayor trying to say it would be premature for the court to issue an opinion are simply the liberal justices trying to find an off-ramp for the case because they are afraid they will be outvoted on the main issue,» said Hans von Spakovsky, a senior legal fellow with Advancing American Freedom.
Chief Justice John Roberts and Justice Clarence Thomas focused on the potential consequences of a Boulder victory. Roberts asked whether a ruling for Boulder could trigger similar lawsuits nationwide. Boulder attorney Kevin Russell acknowledged that the city's theory could allow other fossil-fuel businesses to be sued, though he said legal limits exist. Suncor attorney Kannon Shanmugam warned that 90,000 political jurisdictions and even individuals could sue for climate damages, and argued that Boulder is attempting to resolve a major policy issue through the courts rather than through legislatures.
Alabama Attorney General Steve Marshall, who supported Suncor, said the liberal justices were trying to cast doubt on jurisdiction. «You saw both Justice Jackson and Justice Sotomayor try to find an out for this court, basically saying the court doesn't have jurisdiction at this stage of the case to be able to make a final ruling,» Marshall said. He added that supporters of Suncor believe the lawsuits could bankrupt oil companies and raise consumer prices, describing the effort as an attempt to impose a carbon tax through litigation.
If the Supreme Court declines to reach the federalism issue, the Colorado Supreme Court's ruling allowing Boulder's state-law claims to proceed would remain in place, leaving unresolved how far states can use tort law to pursue climate claims against energy companies. The case is one of the most closely watched of the new term, with implications for energy policy, state authority, and the future of climate litigation across the country.