National (U.S.)

"Discovery that contamination in soil can vaporize and seep into homes has prompted a statewide review of polluted sites."

"SACRAMENTO, Calif. — Since at least last September, trains carrying tank cars filled with crude oil have rolled into the the former McClellan Air Force base. Workers have transferred the oil, including some volatile Bakken crude, from trains to tanker trucks, which take it to Bay Area refineries."

"WASHINGTON — The Obama administration on Friday announced a strategy to start slashing emissions of methane, a powerful greenhouse gas released by landfills, cattle, and leaks from oil and natural gas production."

"LOS ALGODONES, Mexico — Osvel Hinojosa knew that an infusion of water would bring the Colorado River delta back to life. But in just a few days, a U.S.-Mexican experiment to revive the delta environment has exceeded his expectations."

"Peabody Energy Corp., the world's largest private-sector coal company, launched a public relations and advertising campaign last month extolling the virtues of coal energy for poor people."

"The number of U.S. children with autism has surged to one in 68, the Centers for Disease Control and Prevention reported Thursday, a 30 percent increase since the agency estimated just two years ago that one child in 88 suffered from the disorder."

"WASHINGTON — The federal government on Thursday designated the lesser prairie chicken as a threatened species, a long-anticipated announcement that politicians warned could set off a possible battle over states’ rights."

"An Endangered Species Act listing for the lesser prairie chicken is either a death knell for the U.S. oil boom or business as usual for energy developers and landowners in the southern Great Plains. It depends on whom you ask."

"WASHINGTON — The Obama administration is refusing to turn over documents related to enforcement of environmental laws at wind farms where dozens of eagles and other protected birds have been killed, House Republicans charged Wednesday."

"One in 25 U.S. hospital patients has caught an infection while in the hospital, according to new federal data released on Wednesday."