



The Supreme Court heard arguments in Boulder, Colorado's lawsuit against ExxonMobil and Suncor, a case that could determine whether dozens of similar suits against fossil fuel companies nationwide can proceed. Boulder isn't asking the companies to stop selling oil or gas; it wants compensation for allegedly deceiving the public about the harms those products caused, a legal theory Justice Kagan compared to 1990s tobacco litigation.
Justice Kavanaugh pushed back hard, warning the ruling could effectively let states regulate emissions worldwide and potentially bankrupt companies, while the oil companies' attorney floated being personally sued in Colorado for refilling his own car. Boulder's attorney called that framing cavalier, insisting the theory lets companies keep producing as much as the market bears so long as consumers are properly informed.
No clear signal emerged from the arguments, and a ruling could take months. The outcome will likely hinge on narrower legal questions, like the scope of the Clean Air Act, that will ripple differently across the many other pending climate liability cases.
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