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Amanpour & Co.
Richard Alley on the Science Behind the Polar Vortex
Richard Alley is an award-winning climate scientist. He joins the program to break down the science behind the record-breaking polar vortex in the Midwest.
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55:34
Walter Isaacson; Jeremy Diamond; Ali al-Samoudi; Sir David Attenborough; Sherrie Rollins Westin
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55:30
Colette Avital; Bill Weir; Rebecca Solnit; Rep. Anna Paulina Luna; Rep. Teresa Leger Fernández