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  White House: The Polar Vortex Explained in 2 Minutes

  Published On: January 9, 2014
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  Obama: Confronting the Growing Threat of Climate Change

  Published On: June 30, 2013
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  Professor joins fight to save the Arctic

  Published On: May 6, 2013
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  White House warned on Arctic ice loss

  Published On: May 3, 2013
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  Obama calls for swift action to tackle emissions

  Published On: May 2, 2013