The Clean Air Act is under attack in both houses of Congress. Rep. Upton (R-MI), Chair of the House Energy and Commerce Committee, and Sen. Inhofe (R-OK) have introduced a bill that would permanently allow our nation's biggest polluters to dump unlimited amounts of dangerous carbon pollution into our air. The bill may come up first in the Senate, where several senators have launched attacks to block the Environmental Protection Agency from reducing carbon pollution. For instance, Sen. McConnell (R-KY) wants to add the Upton-Inhofe language to an unrelated small business bill. Sen. Rockefeller (D-WV) is proposing to block the EPA from limiting global warming pollution for two years - a delay that could easily become permanent. And Sen. Baucus (D-MT) is proposing to exempt some of the largest carbon pollution sources from having to limit their pollution. The Senate is expected to vote on all of these measures soon.