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The top documents tagged [earths population history]
Earth’s Population History 1 billion reached circa 1830 2 billion reached 1930 (100 years later) 3 billion reached 1959 (29 years later) 4 billion reached
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Human Geography in Action One Billion and Counting: The Hidden Momentum of Population Growth in India Chapter 5 Copyright © 2013 John Wiley & Sons, Inc
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