character: John Deere
topic: Impact of DDT on Agriculture and Farmer Economics
grade: 12
subject: Chemistry
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character: Rachel Carson
topic: Regulation of Pesticides and Environmental Implications
grade: 12
subject: Chemistry
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character: Agricultural Economist
topic: Economic Consequences of DDT Use in Farming
grade: 12
subject: Chemistry
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character: Regulatory Agency
topic: DDT Regulation and Its Effects on Farmers' Practices
grade: 12
subject: Chemistry
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