The Polar Vortex Explained in 2 Minutes
January 08, 2014 | 2:13 | Public Domain
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 at http://wh.gov/climate-change. January 8, 2014.
Download mp4 (88.9MB)
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