Answer
The world population reached 1 billion in 1804, and it reached 6 billion in 1999.
Work Step by Step
The world population reached 1 billion in 1804, and it reached 6 billion in 1999.
Biology 2010 Student Edition
by Miller, Kenneth R.; Levine, Joseph S.
Published by
Prentice Hall
ISBN 10:
9780133669510
ISBN 13:
978-0-13366-951-0
Chapter 5, Populations - Assessment - Connecting Concepts - Use Science Graphics/Write About Science - Page 150: 30
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