character: DDT
topic: Controversial Pesticide and Environmental Consequences
grade: 9
subject: Geography
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character: Rachel Carson
topic: Environmental Impact of Pesticides
grade: 9
subject: Geography
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character: Silent Spring
topic: Book Discussing the Dangers of DDT
grade: 9
subject: Geography
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character: Ecosystem
topic: Effects of Pesticides on Biodiversity
grade: 9
subject: Geography
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