character: Mr. David Smith
topic: Recycling and Waste Management in Chemistry
grade: 9
subject: Chemistry
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character: Ms. Jennifer Lee
topic: Sustainable Practices in Chemistry
grade: 9
subject: Chemistry
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character: Dr. Emily Zhang
topic: Chemical Reactions in Waste Treatment
grade: 9
subject: Chemistry
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character: Mr. Alan Johnson
topic: Impact of Chemistry on Environmental Pollution
grade: 9
subject: Chemistry
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