"Climate ministers and top negotiators from dozens of nations remain deadlocked over how to cut greenhouse gases less than three months before the next major international climate summit."

"The Obama administration is renewing the long-running effort to win U.S. ratification of two international treaties aimed at limiting the reach of the world's most toxic chemicals."

"The world could be on the brink of a major new food  crisis caused by environmental disasters and rampant market speculators, the UN will be warned today at an emergency meeting on food price inflation."

"Across the Far North, populations of caribou — an indispensable source of food and clothing for indigenous people — are in steep decline. Scientists point to rising temperatures and a resource-development boom as the prime culprits."

"A new generation of prospectors is eager to explore the ocean floor. Will deep-sea digging damage one of the earth’s most valuable ecosystems?"

"Environmental degradation and waning natural resources threaten U.S. security in the 21st century, in a shift from 'kinetic' security threats, defense experts told a Capitol Hill briefing Wednesday."

"Several Asian countries in addition to China could soon challenge the United States in the race to build a renewable energy industry if Washington doesn't provide more incentives for its domestic business, venture capitalists and others told a Congressional hearing on Wednesday."

"The world's most deadly form of human malaria, a parasite known as Plasmodium falciparum, is of gorilla origin, and not chimpanzee, bonobo or ancient human origin as scientists previously thought."

The U.S. is expected to announce today that it will contribute to a U.N. effort to address the problem of indoor wood cookstoves whose smoke kills an estimated 1.9 million people annually.