Commonwealth of Massachusetts, et al. v. EPA, et al.

Case Updates

The Supreme Court ruled 5-4 that the Clean Air Act (CAA) authorizes the EPA to regulate carbon dioxide and other greenhouse gas (GHG) emissions from new motor vehicles.

NCLC and other members a coalition of industry associations intervened in support of EPA’s position that Congress did not delegate to the EPA the authority to regulate greenhouse gases. Even if it had, the EPA properly exercised its discretion not to regulate the gases. As an intervenor, NCLC pointed out that neither the structure of the statute nor recent decisions of Congress support such a global regulatory program.