"President Obama has signed into law a bill that requires U.S. airlines be excluded from European carbon emissions fees."

"The Heartland Institute, a libertarian think tank skeptical of climate change science, has joined with the conservative American Legislative Exchange Council to write model legislation aimed at reversing state renewable energy mandates across the country."

"Pennsylvania's environmental protection chief is defending his agency's controversial system for testing water wells near Marcellus Shale operations by saying other states work the same way. But regulators in those states say that's not true."

"A U.S. industrial accident investigative board served Black Elk Energy with a subpoena on Monday, seeking information about last week's offshore Gulf of Mexico oil platform explosion that left one worker dead and another missing."

"The Environmental Protection Agency declined on Friday to relax its requirement on the use of corn ethanol in gasoline, rejecting a request from several states related to a steep decline in the nation’s corn production."

"Hundreds of people who say they worry oil that would be carried the Keystone XL pipeline will accelerate climate change marched around the White House on Sunday, hoping to revive a movement credited with slowing down the permit process for the crude oil project."

"New NAACP analysis pinpoints the disproportionate impact from coal-fired power plants on minorities and the poor."

"The air reeks so strongly of rotten eggs that tribal leader Wes Martel hesitates to get out of the car at an oil field on the Wind River Reservation in Wyoming. He already has a headache from the fumes he smelled at another oil field."

"The shale gas revolution is firing up an old-fashioned American industrial revival, breathing life into businesses such as petrochemicals and glass, steel and toys."