Air

"U.S. EPA has proposed withdrawing part of a George W. Bush-era air toxics regulation, saying the rule may not accurately characterize the risk posed by petroleum refinery emissions."

"The port agrees to remove requirements not directly related to the push to allow only newer, less-polluting trucks at the complex, including a demand that trucking firms file financial reports."

"The Obama administration is cracking down on BP as the oil company overhauls its massive refinery in northwest Indiana, one of the largest sources of air pollution in the Chicago area."

"Groups argue over whether benefits of green technology outweigh the possible health effects associated with burning garbage."