"Richard Muller, a cantankerous but creative physicist at the University of California, Berkeley, who once derided climate change research, then dove in with his own reconstruction of terrestrial temperature changes and confirmed substantial warming, has now concluded that recent warming is 'almost entirely' human caused."

"Strong summer thunderstorms that pump water high into the upper atmosphere pose a threat to the protective ozone layer over the United States, researchers said on Thursday, drawing one of the first links between climate change and ozone loss over populated areas."

"Retail food prices are predicted to rise as soon as this fall due to the high temperatures, low rainfall and 70-year record drought across the Midwest that have boosted commodity prices for corn, soybeans and other field crops, the U.S. Department of Agriculture said today."

"Cutting soot and other air pollutants could help 'buy time' in the fight against climate change, a senior U.S. official said on Tuesday as seven nations joined a Washington-led plan."

"Mexico's new president is unlikely to implement much of the sweeping climate change law signed in June by outgoing President Felipe Calderon amid inevitable resistance from industry and his party's focus on accelerating economic growth and ramping-up oil and gas production, policy experts said."

"Three simple numbers that add up to global catastrophe - and that make clear who the real enemy is."

"The surface of Greenland's massive ice sheet has melted this month over an unusually large area, NASA has said."

"WHITEHORSE, Yukon Territory — In February 1942, President Franklin D. Roosevelt gave the Army Corps of Engineers an assignment: Build a road from British Columbia across the Yukon to Alaska — in eight months, before winter sets in."