character: Gifford Pinchot
topic: Conservation and sustainable resource management
grade: 10
subject: Biology
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character: John Muir
topic: Forestry advocacy and environmental conservation
grade: 10
subject: Biology
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character: Theodore Roosevelt
topic: Presidential support for national parks and forests
grade: 10
subject: Biology
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character: Aldo Leopold
topic: Land ethics and wildlife management
grade: 10
subject: Biology
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