character: Rachel Carson
topic: Silent Spring and its Influence on Environmental Regulations
subject: Science
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character: Environmental Protection Agency
topic: Creation and Role in Chemical Regulation Post-Silent Spring
subject: Science
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character: DDT (Dichlorodiphenyltrichloroethane)
topic: Impact of Silent Spring on the Ban of DDT
subject: Science
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character: Legislation
topic: The National Environmental Policy Act and Chemical Regulation Changes
subject: Science
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