character: Jessica Lee
topic: Impact of Renewable Fuels on Air Quality
grade: 9
subject: Science
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character: John Smith
topic: Renewable Energy Sources and Their Effects on Environment
grade: 9
subject: Science
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character: Maria Nguyen
topic: Air Quality Analysis in Urban Areas
grade: 9
subject: Science
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character: David Brown
topic: The Role of Biogas in Reducing Air Pollution
grade: 9
subject: Science
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