character: Ms. Sarah Johnson
topic: Environmental Impact of Chemical Processes
grade: 9
subject: Chemistry
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character: Mr. David Smith
topic: Recycling and Waste Management in Chemistry
grade: 9
subject: Chemistry
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character: Dr. Emily Chen
topic: Green Chemistry and Sustainable Practices
grade: 9
subject: Chemistry
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character: Ms. Lisa Thompson
topic: Acid Rain and Its Effects on Ecosystems
grade: 9
subject: Chemistry
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