Thomas Friedman says Earth is "Hot, Flat and Crowded"

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Thomas Friedman argues "that we are going from a world of a billion Americans to a world of 2 or 3 billion." And "in a world that is hot, flat and crowded, clean technology is the next great global industry." Pulitzer Prize winning author Thomas Friedman explains the challenges and possibilities facing America and the need for a green revolution.Guest: Thomas Friedman, author and foreign affairs columnist for The New York Times