Biology: The Unity and Diversity of Life (14th Edition)

Published by Brooks/Cole Publishing Co.
ISBN 10: 1305073959
ISBN 13: 978-1-30507-395-1

Chapter 44 - Self-Quiz - Page 797: 8


b. 1999

Work Step by Step

For the human population to reach 1 billion, it took 100,000 years. Because of a decline in mortality rates with no decline in birth rates around the world, the rate of growth has been steadily increasing. To get the human population to increase from 5 billion to 6 billion people, it only took about 12 years. The world population reached 6 billion people in 1999.
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