"GENEVA -- Global warming accelerated since the 1970s and broke more countries' temperature records than ever before in the first decade of the new millennium, U.N. climate experts said Wednesday."

"Scientists have found a way to forecast El Nino weather events in the Pacific a year in advance, long enough to let farmers plant crops less vulnerable to global shifts in rainfall, a study showed on Monday."

"Just a day before President Obama announced he would only approve the Keystone XL pipeline if it 'does not significantly exacerbate the climate problem,' six environmental groups quietly lodged a protest with the State Department charging it would do exactly that."

"The U.S. Environmental Protection Agency has concluded that current testing of hormone-altering chemicals is adequate for detecting low-dose effects that may jeopardize health."

"Following the recent federal decision to list captive chimpanzees as an endangered species, the National Institutes of Health announced Wednesday it would retire the majority of the approximately 360 government-owned chimpanzees currently held in laboratories."

"Yes, such a group exists. It thinks the world is flat -- but also getting warmer."

"President Obama set a high bar for approval of the controversial Keystone XL pipeline, declaring for the first time that he would let the project go forward only if it does not 'significantly increase' emissions of greenhouse gases."

"Republicans in the U.S. House of Representatives made manifest yesterday how much they dislike President Barack Obama's clean-energy agenda as a House spending panel voted for massive cuts in clean-energy research."

"A federal environmental regulator will not finish and review a draft report tentatively linking hydraulic fracturing to Wyoming groundwater contamination and will instead allow state agencies to further investigate the issue."

"AMES, Iowa -- As the car pulled into the parking lot of a Starbucks, William Sanford Nye unknotted his trademark bow tie and slipped it off."