"Federal investigators complained that secret meddling, arrogance and 'shady' conduct on the part of Pacific Gas and Electric Co. hindered their probe into the deadly San Bruno gas pipeline explosion, according to new court filings that shed light on prosecutors’ decision to seek a criminal obstruction-of-justice case against the company."

"House Republicans plan to vote on a bill in the coming weeks to lift the nation’s four-decade ban on oil exports, setting up a clash with the Obama administration later this year over what to do with oil from a boom in domestic production in the past decade,"

"A judge on Monday rejected a bid by North Carolina's environment agency to block Duke Energy from removing toxic coal ash from more plants than required under a new state law."

"More than 400 organizations have joined together, calling for the president to marry his statements about protecting the climate with policy."

"Retiring and replacing Montana’s Colstrip Generating Station, an important supplier to Puget Sound Energy, could be distressingly complicated and costly, public officials and energy executives are finding."

"Federal scientists may have found a link between the 1989 Exxon Valdez oil spill and a decline of herring and pink salmon populations in Prince William Sound."

"Burning all the world’s deposits of coal, oil and natural gas would raise the temperature enough to melt the entire ice sheet covering Antarctica, driving the level of the sea up by more than 160 feet, scientists reported Friday."

"CSX Transportation moves up to five trains, each carrying 1 million gallons or more of a kind of crude oil, through Baltimore weekly, according to records released Wednesday by the Maryland Department of the Environment."

"A federal judge heard conflicting arguments Thursday on whether he should block a capacity expansion on the Alberta Clipper oil pipeline or allow a temporary workaround that lets Enbridge Energy move hundreds of thousands of barrels per day of Canadian tar sands crude across the border without triggering the kind of environmental review that has held up the proposed Keystone XL pipeline."

"A House subcommittee voted Thursday to lift the 40-year-old restriction on exporting crude oil, moving the legislation a significant step toward passage."