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Why Leaves Really Fall Off Trees

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Melting at the base of this Texas-sized ice pack in the Amundsen Sea off Antarctica could lead to significant ocean level rise in the long term. This image of the ice shelf was taken on the first flight of Ice Bridge from an altitude of 20,000 feet. NASA hide caption

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NASA

NASA Launches Mission To Track Polar Ice By Plane

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Senate Hearing On Climate Bill Heats Up

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U.S. Envoy: No Bilateral Climate Deal With China

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Clean Energy Touted As Good For Planet And Jobs

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Bioengineered Plants Gone Wild

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Concern About Climate Change Waning

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Going 'Green' For Halloween?

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Aspen Die-Off May Hurt Colorado's Economy

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For NFL, L.A. Considers Trading Environment For Jobs

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Demonstrating What 350 Means To Climate Change

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A farmer harvests corn on a farm near Spring Mills, Pa. According to current biofuel laws, if you burn ethanol from corn in your car, the government doesn't count the carbon dioxide that comes out of the tailpipe as an actual carbon emission. Carolyn Kaster/AP hide caption

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Carolyn Kaster/AP

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Using Trees To Curb Climate Change Not So Simple

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A customer looks at a display of televisions in a Best Buy store in San Francisco. California state regulators are currently considering ways to reduce the power consumption of flat-panel televisions. Justin Sullivan/Getty Images hide caption

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Questions Linger Over Energy Star Ratings

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Innovative 'Times' Reporter Draws Limbaugh's Ire

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