character: Mr. John Smith
topic: Chemical Reactions and Air Pollution
grade: 9
subject: Chemistry
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character: Emily Davis
topic: Understanding the Impact of Chemical Reactions on Air Quality
grade: 9
subject: Chemistry
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character: Michael Johnson
topic: The Role of Chemistry in Environmental Protection
grade: 9
subject: Chemistry
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character: Sarah Lee
topic: Chemical Reactions: Contributing Factors to Air Pollution
grade: 9
subject: Chemistry
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