Massachusetts v. EPA, US Supreme Court, April 2, 2006 [ruling that the Environmental Protection Agency has the authority under the Clean Air Act to regulate the emission of "greenhouse gases," such as carbon dioxide, by automobiles]. Read the court's 5-4
opinion [text] per Justice Stevens, along with a
dissent [text] from Justice Roberts and a second
dissent [text] from Justice Scalia. Reported in JURIST's
Paper Chase here.