A trio of House lawmakers yesterday introduced a bill to block U.S. EPA's authority to regulate greenhouse gases, marking the latest in a string of bipartisan attacks against forthcoming climate rules. The measure from Agriculture Chairman Collin Peterson (D-Minn.) and Missouri Reps. Ike Skelton (D) and Jo Ann Emerson (R) would amend the Clean Air Act to prohibit EPA from regulating greenhouse gases based on their effects on global climate change.