The flame-retardant chemicals known as PBDEs are virtually ubiquitous in U.S. waters. New research shows that when PBDEs are exposed to wastewater treatment, they can generate dioxins.

Touring the Everglades by airboat, Interior Secretary Salazar promised more federal funds to restore them.

"U.S. government and university scientists are partnering to form a new cooperative institute that will use satellite observations to detect, monitor and forecast climate change and its impact on the environment."

Agriculture Secretary Vilsack took personal control over logging and road projects on tens of millions of acres of National Forest in a temporary effort to resolve controversy over the "Roadless Rule."

A power struggle has erupted over a North Carolina river.

"The most likely place for oil in the Arctic is off northern Alaska in the Chukchi Sea, the researchers report. But conservationists warn of drilling in the fragile environment."

Congress decision, under pressure from the gun lobby, to allow loaded, concealed weapons in National Parks creates problems for rangers trying to keep people safe.

"China is ready to strengthen its cooperation with the United States to combat climate change, Premier Wen Jiabao told US House Speaker Nancy Pelosi on Wednesday, state media reported."

The economic stimulus will bring another $2 billion in cleanup funds to the Hanford nuclear reservation in Washington state.

Scientists from the National Center for Atmospheric Research say melting Greenland ice sheets could raise sea levels more in the northeaster US and Maritime Canada because of a change in ocean currents.

American shad are struggling with little success to make a comeback in Virginia's James River. Historically abundant, this "founding fish" disappeared for years because its spawning was blocked by dams.

A draft bill from the House Natural Resources Committee would drastically reform the Interior Department's corruption-plagued system for collecting oil and gas royalties.

A BioBlitz is a kind of whirlwind count of all the species in a specific place. The Park Service has been co-sponsoring BioBlitzes with National Geographic.

"Global energy demand is expected to soar 44 percent over the next two decades with most of the demand coming from developing countries such as China and Russia, the U.S. government's top energy forecasting agency said on Wednesday."

Private well water should be tested yearly, two major scientific bodies say -- sometimes more often when kids are drinking it.