 | President Obama's Science and Technology Advisor, Dr. John Holdren, explains the polar vortex in 2 minutes—and why climate change makes extreme weather more likely going forward. Learn more... | From: The White House Views: 264   1 ratings |
| Time: 02:13 | More in News & Politics |
Wednesday, January 8, 2014
The Polar Vortex Explained in 2 Minutes
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