character: Ms. Emily Chang
topic: Preventative Measures for Air Quality Improvement
grade: 9
subject: Science
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character: Dr. John Smith
topic: Effects of Air Pollution on Health
grade: 9
subject: Science
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character: Mr. David Lee
topic: Renewable Energy Sources and Air Quality
grade: 9
subject: Science
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character: Ms. Sarah Thompson
topic: Indoor Air Quality and Its Impact on Students
grade: 9
subject: Science
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