character: Environmental Scientist
topic: Effects of Traffic Congestion on Urban Pollution
grade: 9
subject: Geography
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character: Urban Planner
topic: Mitigating Urban Pollution through Sustainable Transportation
grade: 9
subject: Geography
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character: Traffic Engineer
topic: Designing Roads to Reduce Congestion and Pollution
grade: 9
subject: Geography
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character: Ecologist
topic: The Impact of Urbanization on Local Air Quality
grade: 9
subject: Geography
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