The Supreme Court opened its latest session on Monday facing a complex legal puzzle that could determine whether oil giants are financially responsible for the devastation caused by climate change. At the center of the debate is a lawsuit filed by the city and county of Boulder, Colorado, against Exxon Mobil and Suncor Energy. While the immediate dispute focuses on Colorado’s struggle with extreme heat and catastrophic wildfires, the final ruling will likely set a precedent for dozens of similar cases pending across the United States.

Throughout the proceedings, the justices appeared deeply divided, reflecting a fractured bench that struggled to find common ground. Chief Justice John Roberts expressed concern over a potential floodgate effect, questioning if a victory for Boulder would trigger a wave of municipal lawsuits in every state. However, he also acknowledged that suing out-of-state companies over harmful products is standard practice in state courts. Meanwhile, Justice Elena Kagan drew parallels to previous massive settlements involving tobacco and opioid manufacturers, though she questioned if federal laws like the Clean Air Act might override local claims.

The tension grew as conservative Justice Brett Kavanaugh urged his colleagues not to reinvent the wheel, arguing that existing precedents clearly place pollution regulation under federal rather than state jurisdiction. In contrast, Justice Sonia Sotomayor countered that the lawsuit targets deceptive marketing and advertising rather than trying to cap emissions directly. Adding to the uncertainty was the unexpected absence of Justice Samuel Alito, who recused himself from the case following criticism regarding his stock holdings in energy companies.

Because Alito sat out the hearing, there is now a distinct possibility of a four-four tie. Such a result would leave the overarching legal questions unanswered while effectively allowing Boulder’s case to proceed in lower courts. This deadlock comes at a volatile time for environmental policy, as current disputes over EPA authority further muddy the waters regarding how greenhouse gases should be regulated. For now, the court remains undecided on whether corporate misinformation campaigns can be punished through state-level liability suits or if such global crises belong exclusively in federal hands.