character: Professor John Smith
topic: Effects of Public Transportation on Urban Air Quality
grade: 12
subject: Geography
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character: Urban Transportation Expert
topic: Sustainable Urban Mobility Solutions
grade: 12
subject: Geography
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character: Environmental Scientist
topic: Air Quality and Public Transportation Systems
grade: 12
subject: Geography
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character: Urban Planner
topic: Impact of Transit-Oriented Development on Air Quality
grade: 12
subject: Geography
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