The House passed a bill that would give some $4 billion in vouchers to owners of gas-guzzlers who trade them in for more efficient cars. It would boost car sales.

Witnesses at a Senate Hearing testified about many ways in which the world's oceans are already being affected by global warming.

"Canada plans to expand one of its most prized parks to more than six times its current size in a move to help protect the habitats of grizzly bears, caribou and other species...."

"The Senate Energy and Natural Resources Committee approved expanded oil and gas leasing today in the eastern Gulf of Mexico in a bipartisan vote that would upend a 2006 compromise with Florida senators that provided their state at least a 125-mile buffer in most areas until mid-2022."

"U.S. Environmental Protection Agency Administrator Lisa Jackson at a Senate hearing Tuesday outlined several changes to the agency's scientific review and assessment processes that reverse protocols enforced during the Bush administration."

Green collar jobs are at the heart of President Obama's economic program. Some laid-off blue-collar workers are starting to wonder what those green collar jobs will look like.

"Forty Years After The Population Bomb Ignited Controversy, Paul Ehrlich Continues to Stir Debate"