Today the Supreme Court ruled 5-4 that carbon dioxide and other greenhouse gases must be regulated under the Clean Air Act, giving the EPA jurisdiction over emissions from cars.
What this could mean is support from the EPA for state-run programs to limit tailpipe emissions from new cars, beginning with 2009 models. In the short term it is affirming to have confirmation from our Judiciary (or at least, just over half of its members) that global warming exists. Big steps. (AP)