Paul Ehrlich warned of a looming ecological crisis in his 1968 best-selling book, “The Population Bomb.” Forty years later, he’s back with a new look at how the impact human evolution has had on the environment may threaten the survival of the species.

Guests

  • Paul Ehrlich president, Center for Conservation Biology, Bing Professor of Population Studies, Stanford University and author of "The Dominant Animal" and "The Population Bomb"

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