"Alleging violations of the federal Clean Water Act at the Colbert Fossil Plant, a coalition of environmental groups announced plans to file a lawsuit against the Tennessee Valley Authority on Wednesday."

"New York State's decision to lift a four-year ban on natural gas drilling faced further delay on Tuesday after officials conducting a key health impact study asked for more time to form their conclusions on the divisive issue."

"HOUSTON -- In another blow to its Alaskan Arctic drilling program, Royal Dutch Shell said on Monday that it had decided to tow its two drill vessels there to Asian ports for major repairs, jeopardizing its plans to begin drilling for oil in the icy northern seas next summer."

"HOUSTON -- More than 80 environmental groups on Monday demanded a broad investigation into whether the U.S. Environmental Protection Agency behaved improperly when it abruptly dropped enforcement actions against a gas driller it had accused of contaminating water in Texas."

"The Interior Department will investigate whether mining companies are gaming the federal government by skirting royalty payments, a pair of senior senators announced Friday."

"YOUNGSTOWN, Ohio -- Backlash over Hard Rock Excavating’s decision to dump thousands of gallons of fracking waste into a storm drain continued Wednesday with sharp criticism of both state law and the oil and gas industry."

"TransCanada, the company currently constructing the southern segment of the Keystone XL pipeline, claims to use 'top quality steel and welding techniques' throughout its pipeline network. Last week, however, activists fighting the construction of the pipeline released images of what they claim are improperly welded pipeline seams. The photos were released by Keystone XL blockader Ramsey Sprague at the Pipe Tech Americas 2013 conference in Texas and were taken by blockader Isabel Brooks."

"Southern California Edison and the maker of steam generators at San Onofre nuclear plant knew about problems with the generators even before they were installed, Boxer and a congressman assert."

"Greenhouse gas emissions from U.S. power plants fell 4.6 percent in 2011 as more generators were switched to cleaner-burning natural gas and renewable sources from coal, according to new data from the Environmental Protection Agency."