"PITTSBURGH -- The boom in natural gas drilling has cast two opposing documentary filmmakers in unlikely roles."

"A landmark federal study on hydraulic fracturing, or fracking, shows no evidence that chemicals from the natural gas drilling process moved up to contaminate drinking water aquifers at a western Pennsylvania drilling site, the Department of Energy told The Associated Press."

"Reports from a landmark meeting to debate protections for Antarctic wildlife suggest that Russia has stalled U.S. and European initiatives to establish no-kill zones in the Southern Ocean."

BERLIN -- Sea levels could rise by 2.3 metres for each degree Celsius that global temperatures increase and they will remain high for centuries to come, according to a new study by the leading climate research institute, released on Monday."

"Coastal habitats like reefs and marshes protect people from natural disasters—in the right locations."

"Tokyo Electric Power Co. has started taking measures to contain highly radioactive groundwater at the Fukushima No. 1 nuclear plant, but its strategy is based on a theory that is disputed by industry experts."

"An extensive new study confirms a long-suspected link between crippling birth defects and the nitrate contamination that threatens drinking water for 250,000 people in the San Joaquin Valley."

"The area of ocean set aside as a nature preserve could double or triple in the coming days, depending on the outcome of a meeting in Germany. Representatives from 24 countries and the European Union are considering setting aside large portions of ocean around Antarctica as a protected area. And the deal may hinge on preserving some fishing rights."

"WASHINGTON -- Environmentalists on Monday filed a petition with the U.S. government requesting regulatory safeguards for 81 particularly vulnerable marine wildlife species, from corals to sharks."