character: Dr. Jones
topic: Effects of Heavy Metals on Aquatic Ecosystems
grade: 11
subject: Chemistry
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character: Ms. Smith
topic: Impact of Pollution on Marine Life
grade: 11
subject: Chemistry
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character: Mr. Brown
topic: Toxicology of Heavy Metals in Water Sources
grade: 11
subject: Chemistry
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character: Dr. Green
topic: Chemical Properties of Heavy Metals and Environmental Consequences
grade: 11
subject: Chemistry
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