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Ozone
Chapter 1, 2, 3 (3.2 MB)
Chapter 5 (0.8 MB)

Losing Biodiversity
Chapter 1, 2, 3 (3.9 MB)
Chapter 5 Investigation (0.4 MB)

Energy Flow
Chapter 1, 2, 3 (6.4 MB)
Chapter 8 (2.5 MB)

Ecosystem Change
Chapter 1, 2, 3 (8.8 MB)
Chapter 5 Investigation (0.2 MB)

Population Growth
Chapter 1, 2, 3 (2.9 MB)

Energy Use
Chapters 1-4 (3.4 MB)
Chapter 7 Investigation (0.9 MB)

A Changing Cosmos
Chapter 1, 2, 3, 4 (6.6 MB)
Chapter 6, 7, 8 (3.4 MB)
Chapter 9 Investigation (0.3 MB)

ABCs of Digital Earthwatch Software (7.4 MB)