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population

A tough decision from the gut.
Gregg  Braden
Gregg Braden Nov 21, 2011 at 09:00 AM

By any measure, the 20th century was a wild ride for the people of Earth. Between 1900 and 2000, we went from a world of about 1.6 billion to over 6 billion people, survi...read full story

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