character: Theodore Roosevelt
topic: Preservation and conservation policies in the early 20th century
grade: 11
subject: Science
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character: John Muir
topic: Advocacy for national parks and wilderness preservation
grade: 11
subject: Science
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character: Gifford Pinchot
topic: Introduction of sustainable forestry practices
grade: 11
subject: Science
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character: Rachel Carson
topic: Impact of early conservation efforts on the environmental movement
grade: 11
subject: Science
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