West Virginia v. EPA

Background

Several States, coal companies, and the Environmental Protection Agency fought over EPA’s 2015 Clean Power Plan, which used the Clean Air Act’s Section 111(d) to set limits on carbon dioxide from existing coal and gas power plants. EPA’s plan identified a “best system” made of three “building blocks,” including generation shifting toward natural gas and renewables. EPA later repealed the Plan and issued the ACE rule; courts then reviewed those moves.

Reasoning

The Court addressed whether Section 111(d) authorized EPA to set emissions caps that would be achieved largely by shifting generation across the electric grid. Applying a “major questions” approach and reviewing the statute’s text and history, the Court concluded that Congress had not granted EPA authority to restructure the Nation’s power mix through generation shifting. The Court therefore reversed the D.C. Circuit’s decision and held that the Clean Power Plan’s generation‑shifting method exceeded EPA’s statutory authority.

Real world impact

The ruling limits EPA’s ability to impose nationwide caps that depend on moving electricity production from coal to cleaner sources without clear congressional authorization. It leaves large-scale changes to the electricity mix to Congress or to rulemaking that rests on an unmistakably clear grant of power. States must still implement whatever EPA limits are lawfully adopted, and future rulemaking is possible.

Dissents or concurrances

A concurring opinion emphasized separation of powers and the need for clear congressional delegations. A dissent argued the Court improperly removed a statutory tool EPA could use to address climate change and warned the decision interferes with efforts to cut greenhouse‑gas emissions.