character: Rachel Carson
topic: Biodiversity and the impact of DDT on wildlife
grade: 8
subject: Social Studies
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character: Environmentalists
topic: Effects of pesticides on ecosystems
grade: 8
subject: Social Studies
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character: Scientists
topic: Research on DDT and its environmental consequences
grade: 8
subject: Social Studies
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character: Policy Makers
topic: Legislation following findings in Silent Spring
grade: 8
subject: Social Studies
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