About how many years of human existence passed before the world population reached its first billion? What

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About how many years of human existence passed before the world population reached its first billion? What factors restricted population before that time, and what factors contributed to growth after that point?

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Principles of environmental science inquiry and applications

ISBN: 978-1259656415

7th edition

Authors: William P. Cunningham, Mary Ann Cunningham

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Question Posted: Feb 17, 2016 04:35 AM

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About how many years of human existence passed before the world population reached its first billion? What

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The human population reached 1 billion in 1804 so our species existed about 20...View the full answer

Principles of environmental science inquiry and applications

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