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Seed: The Untold Story | Self | 2016-09-23 |
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A Dangerous Idea | Himself | 2016-12-09 |
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Call of Life: Facing the Mass Extinction | Himself | 2010-05-11 |
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Fed Up! | Himself - Department of Environmental Science, Policy, and Management, University of California, Berkeley | 2002-01-01 |
