"A landmark agreement to protect shark species threatened with extinction was reached Friday as 113 countries signed up to a United Nations-backed wildlife treaty to conserve migratory sharks."

"A range of health problems are linked to the pits on military bases in Iraq and Afghanistan. Toxic substances have been found in the smoke."

"President Barack Obama's award of billions of dollars in federal nuclear loan guarantees to Southern Co. has angered environmentalists who say the president is embracing the energy powerhouse that worked aggressively to defeat a key climate change bill championed by his administration."

"An environmental contractor dramatically underreported the level of a cancer-causing chemical found in tap water at Camp Lejeune, then omitted it altogether as the Marine base prepared for a federal health review, an Associated Press review has found."

"The early optimism of environmental advocates that the policies of former President George W. Bush would be quickly swept away and replaced by a bright green future under Mr. Obama is for many environmentalists giving way to resignation, and in some cases, anger."

"The U.N. climate chief Yvo de Boer has resigned to join a consultancy group as an adviser, the U.N. climate secretariat said on Thursday, two months after a disappointing Copenhagen summit."

"Industry groups, conservative think tanks, lawmakers and three states filed 16 court challenges to U.S. EPA's "endangerment" finding for greenhouse gases before yesterday's deadline, setting the stage for a legal battle over federal climate policies."

"A federal judge has thrown out an industry lawsuit that could have led to more logging and road building in Alaska's Tongass National Forest, the nation's largest federal forest."