Is the Fight against Global Warming a Losing Battle?

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Scientists now say climate change can’t be reversed for 1000 years, even if greenhouse gases are cut to pre-industrial levels. What does that mean for green technology?  Should the consumer economy be reduced instead of expanded?  Also, Governor Blagojevich makes the closing argument in his impeachment trial, and Mail service may be eliminated on Saturdays -- or maybe on Tuesdays. We find out why.

Banner image: Former Vice President Al Gore shows a slide show while speaking during a Senate Foreign Relations Committee on January 28. Photo: Mark Wilson/Getty Images