American Electric Power Co. v. Connecticut

Justia Summary

Plaintiffs, several states, the city of New York, and three private land trusts, sued defendants, four private power companies and the federal Tennessee Valley Authority, alleging that defendants' emissions substantially and unreasonably interfered with public rights in violation of the federal common law of interstate nuisance, or in the alternative, of state tort law. Plaintiffs sought a decree setting carbon-dioxide emissions for each defendant at an initial cap to be further reduced annually. At issue was whether plaintiffs could maintain federal common law public nuisance claims against carbon-dioxide emitters. As a preliminary matter, the Court affirmed, by an equally divided Court, the Second Circuit's exercise of jurisdiction and proceeded to the merits. The Court held that the Clean Air Act, 42 U.S.C. 7401, and the Environmental Protection Act ("Act"), 42 U.S.C. 7411, action the Act authorized displaced any federal common-law right to seek abatement of carbon-dioxide emissions from fossil-fuel fired power plants. The Court also held that the availability vel non of a state lawsuit depended, inter alia, on the preemptive effect of the federal Act. Because none of the parties have briefed preemption or otherwise addressed the availability of a claim under state nuisance law, the matter was left for consideration on remand. Accordingly, the Court reversed and remanded for further proceedings.