Author Abrahm Lustgarten joins the show to discuss his new book, "On the Move."
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Lustgarten has written an account of what a massive population shift might look like with the overheating of the Earth. He describes four unstoppable forces as predictors to the uprooting of America: wildfires in the West; frequent flooding in coastal regions; extreme heat and humidity in the South; and droughts that will affect farming across much of the nation.