character: Mr. Johnson
topic: Effects of Pesticides on Soil Quality
grade: 11
subject: Chemistry
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character: Ms. Adams
topic: Impact of Chemicals on Aquatic Ecosystems
grade: 11
subject: Chemistry
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character: Dr. Smith
topic: Toxicity of Heavy Metals in Soil
grade: 11
subject: Chemistry
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character: Mr. Lee
topic: Acid Rain and Its Effects on Water Sources
grade: 11
subject: Chemistry
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