"The Agriculture Department has exempted a genetically engineered grass from federal regulation, a decision that some critics say could portend a loosening in oversight of biotech crops."

"In big cities around the world, cyclists breathe an array of pollutants from exhaust-spewing cars. A new study has now found a link between cycling on high traffic roads and heart risks. Even healthy cyclists had harmful changes in their heart rates. Experts say cyclists should stick to their two-wheels, however, pointing to simple solutions to reduce exposure."

"Minnesota state parks closed at night since the government shutdown last week have reported numerous incidents of break-ins, vandalism burglary and graffiti, a state enforcement officer said on Wednesday."

"Credibility is a precious thing. Oil giant ExxonMobil did not have much to begin with, but it went even deeper into its scarce reserves in the past few days when a company pipeline spilled oil into a river that runs past the homes of about 6,500 people. Wednesday brought another blow: it turns out ExxonMobil needed almost an hour to fully seal the burst pipeline instead of the 30 minutes company president Gary Pruessing had initially said it took."

"Environmental Protection Agency Administrator Lisa Jackson is expected to announce tough new regulations Thursday that seek to significantly reduce emissions from many coal-fired power plants."

FEMA trailers rejected after Hurricance Katrina because of formaldehyde concerns are being welcomed by Indian tribes in Oklahoma who have little else to live in.

"Environmentalists are waving a red flag in their fight to prevent uranium mining in Virginia, claiming there's a chance toxins from mine operations could make their way into Fairfax County's water supply if the ban is lifted."

"The Environmental Protection Agency has become a target of House Republicans and of GOP presidential hopefuls. They say its rules are job killers. A new White House report finds air pollution rules from the EPA cost far more than other government regulations. But they also result in far more benefits than other government mandates."

"Tons of imported fish laced with chemicals banned from the U.S. food supply, including carcinogens, are routinely showing up in this country and, state officials say, winding up on American dinner plates."

"Honking horns and waving to firefighters, residents of a New Mexico city threatened by a massive wildfire rolled back into Los Alamos nearly a week after flames forced an evacuation and the closure of a nearby major nuclear weapons laboratory."