About-face: Former climate change skeptic now says global warming is man-made | The Lookout - Yahoo! News
Richard A. Muller, a physics professor at the University of California-Berkeley, announced that his much-publicized investigation into climate data has found that humans' production of carbon dioxide is causing the world to slowly warm up. And this process could speed up dramatically in the coming years.
http://news.yahoo.com/blogs/lookout/former-climate-change-skeptic-now-says-global-warming-134617449.html
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