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The top documents tagged [soil degredation]
3.2/3.3 How Humans and Introduced Species Influence Ecosystems
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1.15 The Impacts of Human Industry on Ecosystems (Sec 5.4 p 126-130)
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Environmental Science FIRST EDITION Andrew Friedland Rick Relyea © 2012 W. H. Freeman and Company CHAPTER 1 Studying the State of Our Earth
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Chapter 3 Ecosystems continually change over time
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