character: Mr. Davis
topic: Effects of Chemical Pollution on Ecosystems
grade: 11
subject: Chemistry
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character: Ms. Johnson
topic: Impact of Heavy Metals on Aquatic Life
grade: 11
subject: Chemistry
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character: Dr. Smith
topic: Chemical Runoff and Soil Degradation
grade: 11
subject: Chemistry
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character: Professor Green
topic: Acid Rain and its Effects on Forest Ecosystems
grade: 11
subject: Chemistry
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