character: Dr. Chen
topic: Toxicity of Heavy Metals in Freshwater Species
grade: 11
subject: Chemistry
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character: Dr. Smith
topic: Effects of Water Pollution on Aquatic Life
grade: 11
subject: Chemistry
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character: Ms. Johnson
topic: Bioaccumulation of Heavy Metals in Fish
grade: 11
subject: Chemistry
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character: Mr. Lewis
topic: Chemical Analysis of Heavy Metal Contamination in Rivers
grade: 11
subject: Chemistry
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