character: James White
topic: Effects of traffic congestion on air quality
grade: 6
subject: Science
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character: Traffic Engineers
topic: Solutions to reduce traffic congestion
grade: 6
subject: Science
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character: Environmental Scientists
topic: Impact of pollutants on air quality
grade: 6
subject: Science
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character: Urban Planners
topic: City designs to improve air quality
grade: 6
subject: Science
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