"DENVER -- Colorado regulators looking at new air quality rules for oil and gas drillers are getting more time to set the rules."

"WASHINGTON -- About 200 environmental activists gathered in front of the State Department Monday morning to protest the proposed expansion of the Keystone XL pipeline through the midwestern United States."

"Environmental Protection Agency chief Gina McCarthy said natural-gas production — with the right safeguards -- is a major piece of Obama administration efforts to combat global warming."

"WASHINGTON — A federal appeals court ruled on Tuesday that the Nuclear Regulatory Commission was 'flouting the law' when it stopped work on a review of the proposed nuclear waste dump at Yucca Mountain, despite the Obama administration’s insistence that the site be shut down."

"TALLAHASSEE, Fla. -- Federal officials are declaring a fishery disaster for Florida's oyster industry in the Gulf of Mexico.

The collapse of the oyster industry last year followed a drought that reduced freshwater into Apalachicola Bay. But state officials have also blamed the lack of freshwater flow due to increased consumption in Georgia.

"Here comes more bad PR for climate change–denying politicians.

"Britain's Prime Minister David Cameron has given his unequivocal backing to the divisive 'fracking' process used to extract shale gas from rocks, risking angering his party's supporters from more rural areas."

"A 27-year-old U.S. program intended to warn the public of the presence of hazardous chemicals is flawed in many states due to scant oversight and lax reporting by plant owners, a Reuters examination finds."

TransCanada and Department of Homeland Security keep close eye on activists, FOIA documents reveal."

A legislative and regulatory battle over slaughter of wild horses is dividing conservation celebrities and American Indians in the Southwest and Mountain West.

"A year ago, the Fish and Wildlife Service was poised to use a scientifically flawed range map for the American burying beetle during a preliminary assessment of the Keystone XL pipeline's effect on the endangered insect."

"WASHINGTON — As part of the climate change agenda he unveiled this year, President Obama made a commitment to significantly reduce the federal government’s dependence on fossil fuels. The government, he said in a speech in June at Georgetown University, 'must lead by example.' But just two miles from the White House stands the Capitol Power Plant, the largest single source of carbon emissions in the nation’s capital and a concrete example of the government’s inability to green its own turf."

"NEW YORK -- All of the notices U.S. regulators received to vouch for the safety of common food additives between 1997 and 2012 were submitted by people who had a vested interest in the outcome of those assessments, according to a study published in JAMA Internal Medicine on Wednesday."

"The Environmental Protection Agency is proposing to let oil companies continue to dump polluted wastewater on the Wind River Reservation in Wyoming. This includes chemicals that companies add to the wells during hydraulic fracturing, an engineering practice that makes wells produce more oil."

"Developers of the proposed Pebble mine don't deserve special protections for buying insider documents about the financial workings of project opponents and then using the records to pursue a case against those opponents with the Alaska Public Offices Commission, a California appeals court panel ruled [July 30]."