"The treeless ecosystem of mosses, lichens, and berry plants is giving way to shrub land and boreal forest. As scientists study the transformation, they are discovering that major warming-related events, including fires and the collapse of slopes due to melting permafrost, are leading to the loss of tundra in the Arctic."

"It sounded like a good idea: Provide a little government money to convert wood shavings and plant waste into renewable energy. But as laudable as that goal sounds, it could end up causing more economic damage than good."

"Frigid weather that has gripped swathes of the northern hemisphere this winter is unusual but does not undermine an overall global trend of warming, experts said on Monday."

After getting major concessions in return for bare acquiescence on the House climate bill, the nation's main agribusiness lobby declared it will try to kill climate legislation altogether in the Senate, using conservative rhetoric about a federal "power grab" and expressing doubt about whether human activities are causing global warming.