A landmark case and a surprising judgement given the lobbying power of the US auto industry and the EPA's own reluctace to do so (wonder why). Excerpt below
Supreme Court Declares EPA Reasons for Not Regulating Carbon "Arbitrary, Capricious"
This is a landmark case, or at the least the beginning of a series of landmark cases: in a 5-4 decision, the Supreme Court today sent the issue of whether or not the EPA can regulate carbon dioxide back to the lower courts, declaring the EPA's decision not to regulate carbon emissions "arbitrary, capricious or otherwise not in accordance with law."
The EPA had previously declared that the Clean Air Act does not give it the authority to regulate carbon dioxide and other heat-trapping greenhouse gases.