Here's a story from the "Can You Believe This?" files: several states, California among them, are suing the Environmental Protection Agency (EPA) for failure to regulate greenhouse emissions! In the words of the National Environmental Trust (NET):

First, the agency said that the Clean Air Act provided the agency no authority to regulate greenhouse gases (reversing the agency’s previous legal conclusion, which it had repeatedly voiced to Congress in 1998,1999, and 2000).

Second, EPA stated that it wouldn’t regulate greenhouse gas emissions even if it had statutory authority because the agency preferred voluntary programs and further study.

Here is more of NET's analysis. Here are articles retrieved by Google News on the story.