Sarah Goforth
project assistant

S.V. Medaris
designer/illustrator

Darrell Schulte
webmaster

David Tenenbaum
feature writer

Amy Toburen
content development
executive

Credits

Jared Diamond
Department of Geography
University of California, Los Angeles

Ward Chesworth
Department of Land Resource Sciences
University of Guelph, Ontario

* David Pimentel
Department of Entomology
Cornell University

David Smith
U.S. Geological Survey

Wes Jackson
Director
The Land Institute

* Denotes fact-checker

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