character: Mr. Lee
topic: Impact of Chemical Pollutants on Ecosystems
grade: 11
subject: Chemistry
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character: Ms. Rodriguez
topic: Effects of Heavy Metals on Aquatic Life
grade: 11
subject: Chemistry
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character: Dr. Chen
topic: Biodegradation of Plastic Pollutants
grade: 11
subject: Chemistry
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character: Mr. Thompson
topic: Acid Rain and Its Impact on Terrestrial Ecosystems
grade: 11
subject: Chemistry
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