character: Mr. Johnson
topic: Government Intervention in Economics
grade: 10
subject: Economics
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character: Ms. Smith
topic: Negative Externalities and Their Effects
grade: 10
subject: Economics
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character: Dr. Lee
topic: Regulatory Policies for Mitigating Externalities
grade: 10
subject: Economics
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character: Professor Adams
topic: The Role of Taxes in Addressing External Costs
grade: 10
subject: Economics
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