 Massachusetts v. Environmental Protection Agency

Massachusetts v. Environmental Protection Agency, 549 U.S. 497 (2007), is a 5-4 U.S. Supreme Court case in which twelve states and several cities of the United States, represented by James Milkey, brought suit against the Environmental Protection Agency (EPA) to force that federal agency to regulate carbon dioxide and other greenhouse gases (GHGs) as pollutants.Section 202(a)(1) of the Clean Air Act (CAA), 42 U.S.C.