character: Dr. Smith
topic: Effects of Heavy Metals on Aquatic Life
grade: 11
subject: Chemistry
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character: Professor Johnson
topic: Impact of Pollution on Marine Ecosystems
grade: 11
subject: Chemistry
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character: Ms. Lee
topic: Toxicology of Heavy Metals in Freshwater Fish
grade: 11
subject: Chemistry
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character: Mr. Brown
topic: Heavy Metal Accumulation in Aquatic Organisms
grade: 11
subject: Chemistry
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