character: Theodore Roosevelt
topic: Progressive Era Conservation Policies
grade: 9
subject: History
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character: John Muir
topic: National Parks and Wilderness Preservation
grade: 9
subject: History
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character: Gifford Pinchot
topic: Forestry and Resource Management
grade: 9
subject: History
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character: William Howard Taft
topic: Continued Conservation Efforts
grade: 9
subject: History
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