"A century-old fight about water from Oregon's Klamath Basin ended Thursday with signed agreements that assure farmers water and power to keep their crops green, and lay out the removal of dams that have blocked salmon from hundreds of miles of spawning grounds."

"The sharp-tongued U.N. official who shepherded troubled climate talks for nearly four years announced his resignation Thursday, leaving an uncertain path to a new treaty on global warming."

"The Interior Department is beefing up efforts to ensure companies are paying the royalties they owe from producing energy on federal lands."

"A new Office of Sustainable Communities is being created within the U.S. Environmental Protection Agency to help communities take an integrated approach to making environmental, housing and transportation decisions."

"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."