New York appeals judgment blocking its Climate Superfund Act

On October 23, 2026, New York defendants filed a notice of appeal from the September 23 federal judgment that invalidated the state’s Climate Change Superfund Act on Clean Air Act and foreign-affairs pre-emption grounds. The appeal keeps open whether a state may allocate historic climate costs to large fossil-fuel producers without regulating emissions directly. Companies potentially within the programme’s scope should preserve exposure models and litigation assumptions rather than treating the district-court judgment as final, while counsel should track whether the appellate court separates domestic pre-emption from foreign-commerce concerns. For other jurisdictions considering climate-cost-recovery laws, the eventual reasoning may matter more than the outcome because it will shape which statutory designs survive federal challenge.