Scientists are 95% certain that human activity has caused at least half of climate change in the last 50 years, a U.N. report concludes.
via CNN.com - Top Stories http://edition.cnn.com/2013/09/27/world/climate-change-report/index.html?eref=edition
via CNN.com - Top Stories http://edition.cnn.com/2013/09/27/world/climate-change-report/index.html?eref=edition
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