Texas, Alabama and Virginia, all led by Republican governors, have filed petitions since December, when the EPA ruled that greenhouse gases like carbon dioxide endanger human health, clearing the path for the agency to issue mandatory regulations to reduce them.

As the EPA grapples with the lawsuits, Congress is trying to block the agency from acting without congressional approval. ...

...coal mining states oppose the EPA's plan to target power plants and other industrial facilities.

FOXNews.com - Three States Sue EPA Over Global Warming Ruling