http://consumerist.com/2008/01/02/today-california-sued-the-epa/

Today California sued the EPA over its refusal to let states enact their own greenhouse-gas laws. “Fifteen states plan to intervene on California’s behalf, including 13 of those that have either adopted or are in the process of adopting the rules. Delaware and Illinois, which have not passed the standards, also are part of the lawsuit.” [New York Times]