"A wastewater disposal process done after natural gas extraction — and not the drilling itself — is a plausible cause for the surprising series of minor earthquakes in north Texas, according to a study released Wednesday."

Bedbug-sniffing dogs can locate a single live bug or egg with 96 percent accuracy. The bugs were mostly eradicated in the U.S. by now-banned pesticides like DDT, and are now making a comeback.

"Gov. Bob McDonnell signed into law Wednesday offshore drilling legislation intended to realize his goal of making Virginia the East Coast's energy superpower."

"President Barack Obama's top environmental adviser urged the natural gas industry on Tuesday to disclose the chemicals it uses in drilling, warning that the development of massive U.S. shale gas reserves could be held back otherwise."

"The federal government on Wednesday recommended an endangered-species listing for the loggerhead turtles in U.S. waters, a decision that could lead to tighter restrictions on fishing and other maritime trades."

"UNITED NATIONS -- At a tumultuous time in U.N.-led climate negotiations, one of the world's most credible scientific groups agreed Wednesday to plug the recent cracks in the authoritative reports of the United Nations' Nobel Prize-winning global warming panel."