character: Professor Mark Johnson
topic: Combustion Emissions and Environmental Impact
grade: 9
subject: Chemistry
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character: Dr. Angela Smith
topic: Effects of Air Pollution on Human Health
grade: 9
subject: Chemistry
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character: Mr. David Lee
topic: Chemical Reactions in Combustion Processes
grade: 9
subject: Chemistry
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character: Ms. Rachel Adams
topic: Alternative Fuels and Their Environmental Benefits
grade: 9
subject: Chemistry
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