character: Dr. Smith
topic: Effects of Pollutants on Aquatic Life
grade: 11
subject: Chemistry
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character: Dr. Johnson
topic: Water Quality and its Impact on Fish Population
grade: 11
subject: Chemistry
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character: Professor Lee
topic: Chemical Contaminants in Marine Ecosystems
grade: 11
subject: Chemistry
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character: Ms. Garcia
topic: Heavy Metals and Their Toxicity in Aquatic Systems
grade: 11
subject: Chemistry
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