"A federal appeals court on Friday upheld Endangered Species Act protections for the polar bear."

"Tucked away in northeast Texas, Lake Gilmer was the last major reservoir built in the state, more than a decade ago. Local officials said they had intended to share construction costs and water with a new power plant, but the power company backed out, leaving the City of Gilmer with the bill."

"Environmentalists have a hope. If they can block the Keystone XL pipeline, they can keep Canada from developing more of its dirty tar sands oil. It takes a lot of energy to get it out of the ground and turn it into gasoline, so it has a bigger greenhouse gas footprint than conventional oil. But the State Department report, which was released Friday, says Keystone won't have much of an impact on the development of that oil from Alberta."

"For Jesslyn Brown, sequestration could not come at a worse time of the year."

"SACRAMENTO, Calif. -- California is poised to shatter an all-time weather record by notching the driest January-February period in recorded history across the northern Sierra Nevada."

"Since the drubbing that Superstorm Sandy gave the Northeast in November, there's a new sense of urgency in U.S. coastal cities. Even though scientists can't predict the next big hurricane, they're confident that a warmer climate is likely to make Atlantic storms bigger and cause more flooding."

"PLAINVIEW, Tex. — After two years of drought, people are starting to leave this parched West Texas town."

"BOSTON -- Concerns have cropped up in recent years that the methane leaks from oil and gas fields could be large enough to pose a significant climate threat."

A new study, still tentative, suggests that climate change will have much worse effects on global food production and supply than experts have previously estimated.

"LONDON -- The cause of much of the recent extreme weather across the world is climate change triggered by human activities, scientists say. The paper suggests that man-made climate change is repeatedly disturbing the patterns of airflow around the northern hemisphere."