"Massachusetts, California, Oregon, Rhode Island and Vermont are the most energy-efficient states in the U.S., according to an annual ranking released Wednesday by the American Council for an Energy Efficient Economy, or ACEEE."

"Scott Kidwell, a top executive for Concho Resources Inc., came to Capitol Hill in July to urge senators to pass a bipartisan bill to expedite drilling permits on public lands."

"The U.S. government is drafting rules designed to close an accounting loophole that in recent years has helped coal companies boost export profits and likely cost taxpayers tens of millions of dollars, people familiar with the plan said."

"A watchdog group is suing the Environmental Protection Agency for failing to release communications with the oil industry over the 2014 renewable fuel mandate."

"As the Tomblin administration considers a plan to allow natural gas drilling under the Ohio River, a major chemical maker in Marshall County has been fighting a proposal for hydraulic fracturing near its plant, citing a 'near-catastrophic' gas-well incident last year that might be linked to geologic conditions beneath the river."

"Stretching along the Queensland coast, the reef is an underwater wonderland home to thousands of different fish and coral species. But it is facing multiple threats."

"Federal laws meant to protect drinking water require fracking companies to get a permit before using diesel fuel in the drilling process."

"A study in a rural Ohio county where oil and gas drilling is booming found air pollution levels near well sites higher than those in downtown Chicago."