“EPA has offered no reasoned explanation for its refusal to decide whether greenhouse gases cause or contribute to climate change.” By a 5-4 decision, the Supreme Court determines that the Dubya EPA violated the Clean Air Act when it refused to regulate greenhouse gas emissions, thus hopefully setting the stage for an (admittedly unlikely) reevaluation of global warming by the executive branch. “Chief Justice John G. Roberts Jr. wrote one dissent, which was joined by Justices Samuel A. Alito Jr., Antonin Scalia and Clarence Thomas.” Yep, the usual suspects.