RESUMEN
As threats from climate change become more urgent, the US Supreme Court has responded by erecting a new roadblock to effective climate policy. Last month, it struck down the Clean Power Plan, the Obama administration's never-implemented regulation of greenhouse gas emissions from existing power plants. The ruling [West Virginia v. Environmental Protection Agency (EPA)] is a blow to climate action and could signal the court's hostility to a wide range of future regulations within and beyond the climate and environmental sphere, including those related to consumer protection and worker safety. Although the immediate effects on US climate policy aren't pervasive, EPA now needs to evaluate the emissions-reduction potential and legal risks of alternative regulatory approaches for the power sector.