http://www.huffingtonpost.com/2012/06/07/earth-tipping-point-study_n_1577835.htmlBy Stephanie Pappas, LiveScience Senior Writer Earth is rapidly headed toward a catastrophic breakdown if humans don't get their act together, according to an international group of scientists. Writing Wednesday (June 6) in the journal Nature, the researchers warn that the world is headed toward a tipping point marked by extinctions and unpredictable changes on a scale not seen since th...
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