character: Gifford Pinchot
topic: Forestry and Conservation Practices
grade: 10
subject: Biology
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character: John Muir
topic: Conservation Movement in the U.S.
grade: 10
subject: Biology
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character: Theodore Roosevelt
topic: National Parks and Wildlife Preservation
grade: 10
subject: Biology
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character: Aldo Leopold
topic: Land Ethics and Conservation
grade: 10
subject: Biology
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