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Alan Weisman's 'Countdown' explores Earth's population capacity

Portrait of
Portrait of "Countdown" author Alan Weisman.
Bill Steen
Portrait of
Cover of the book "Countdown" by Alan Weisman.
Alan Weisman

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In his last book, "The World Without Us", author Alan Weisman imagined what the Earth would be like if humans suddenly disappeared. Now he explores a world with us.

His new book "Countdown" explores the "optimum population" to make sure we can stick around on this planet. Alan Weisman joins us in the studio with more.