National (U.S.)

Tough new efficiency standards haven't killed the incandescent light bulb -- but instead are spurring inventors to make better ones.

"Wildlife biologists and climate scientists overwhelmingly agree that the disappearance of Arctic sea ice will lead to a sharp drop in polar bear populations. But some skeptics remain unconvinced, and they have managed to persuade the Canadian government not to take key steps to protect the animals."

"The Senate climate debate cranks up this week with a series of hearings and high-level meetings aimed at producing legislation that can be matched up with last month's House-passed bill."

Urban farmer Will Allen, half a mile from Milwaukee's biggest housing project, is different from others in the good-food movement.

Terry Tamminen, former environmental advisor to California's Gov. Schwarzenegger, is a key player on global climate change now.

"A plan to restore salmon runs on California's Sacramento River could help revive killer whale populations 700 miles to the north in Puget Sound."

Voting with the GOP might seem like an easy political choice for Idaho Democrat Walt Minick. But could it be a problem when he needs clout to help the state?

"Studies Are Homing in on Which Particles Polluting the Air Are Most Sickening -- and Why"

The EPA says North Carolina Has More 'High-Hazard' Sites Than Any Other; the Industry Calls Them Safe.

The Center for Biological Diversity has filed the federal lawsuit on ocean acidification, charging that the EPA has failed to comply with its mandate under the Clean Water Act to protect Washington State’s ocean waters from excessive CO2.