A US federal judge has dismissed a climate lawsuit filed by the state of Michigan against several major oil companies, handing the industry a significant legal victory in the growing wave of climate litigation. The ruling, issued by the US District Court for the District of Columbia, found that Michigan's claims are preempted by federal law and that the appropriate forum for such broad policy questions is Congress and the executive branch, not the judiciary.
Michigan had sued oil majors including ExxonMobil, Chevron, BP, Shell, and the American Petroleum Institute, alleging that the companies knowingly misled the public about the dangers of fossil fuels and contributed to climate change. The state sought damages and equitable relief to fund climate adaptation and infrastructure costs. The court, however, held that the claims are governed by federal common law and that the Clean Air Act and other federal statutes displace state-law causes of action that seek to regulate interstate and international greenhouse gas emissions.
The judge also invoked the political question doctrine, noting that climate change is a global phenomenon that requires a coordinated national and international response. Allowing individual states to pursue damages against energy producers would create an unworkable patchwork of liability that could undermine federal energy policy and foreign relations, the court reasoned. The decision aligns with similar rulings in other US courts that have dismissed state and municipal climate suits on preemption grounds, though some cases remain pending in state courts.
Michigan's attorney general expressed disappointment and indicated that the state is reviewing options for appeal. Environmental groups criticised the ruling as a setback for accountability, arguing that courts have a role in addressing harms caused by deceptive practices. The oil industry welcomed the decision, with representatives saying it confirms that climate policy should be set by elected officials rather than through litigation.
The dismissal is part of a broader legal trend in which US courts have grown increasingly sceptical of climate liability claims against fossil fuel companies. While some state and local governments have had success in state courts, federal judges have consistently found that the issues raised are best resolved by the legislative and executive branches. The ruling does not prevent states from pursuing separate consumer protection or securities fraud claims, but it narrows the path for broad climate damages suits in federal court.
For UK and European observers, the decision highlights the contrast between the US approach and the more expansive climate litigation landscape in Europe, where courts have been more willing to hear cases against governments and corporations. It also underscores the uncertainty facing investors in fossil fuel companies, as legal and regulatory risks continue to evolve across jurisdictions. The case is likely to be cited in future disputes over the role of courts in climate policy.