"The American chestnut tree, which towered over eastern U.S. forests before succumbing to a deadly fungus in the early 20th century, appears to be an excellent sponge for greenhouse gases, according to a new study."

"Advocates and U.S. government agree to list the gray wolf as "threatened" in Minnesota and to put ones in Wisconsin and Michigan on the endangered list."

"California officials said Wednesday they are trying to avert the federal government's threat to seize six parks that could be closed to help reduce the state's ballooning budget deficit."

"The Environmental Protection Agency is proposing tougher rules to reduce air pollution from large oceangoing ships, including oil tankers and cargo vessels."

"People in North Texas worry about tornadoes, not earthquakes. That's not the case in the small town of Cleburne, just south of Fort Worth. They've had six quakes so far this month. Cleburne happens to sit on a huge, recently discovered natural gas deposit called Barnett Shale. There's been a lot of drilling, and some people wonder if that has triggered the earthquakes."

"A federal judge sided with environmentalists yesterday and threw out Bush-era Forest Service regulations that govern management plans for national forests."