What would happen to the Earth if all humans suddenly disappeared?
In his new book The World Without Us, author Alan Weisman discusses how long it would take for all evidence of human life to vanish from the planet.
Weisman says that after just two days without human intervention, the New York City subway system would be flooded. After one year, every nuclear power plant on Earth would have failed or melted down.
Weisman is the author of The World Without Us; an associate professor of Journalism and Latin American Studies at the University of Arizona; and senior editor and producer of Homelands Productions.
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