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Atmosphere's carbon dioxide breaches 400

Many climate scientists, such as James Hansen of NASA's Goddard Institute, believe that any sustained period of time with higher than 350 ppm threatens catastrophic global warming.

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Students, community protest Utah tar sands conference

Students and concerned citizens from a variety of organizations held a protest at a conference of the Institute for Clean and Secure Energy. The institute promotes use of tar sands, oil shale and coal.