character: Mr. David Lee
topic: Air Quality and Human Health: Understanding Pollutants
grade: 9
subject: Science
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character: Dr. Jane Smith
topic: Effects of Air Pollution on Respiratory Health
grade: 9
subject: Science
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character: Ms. Emily Johnson
topic: Sources of Common Air Pollutants
grade: 9
subject: Science
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character: Mr. Robert Brown
topic: Measuring Air Quality and Its Impact on Communities
grade: 9
subject: Science
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