character: Dr. Sarah White
topic: Toxicity of Heavy Metals in Marine Ecosystems
grade: 12
subject: Chemistry
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character: Dr. Emily Clarke
topic: Impact of Pollution on Aquatic Life
grade: 12
subject: Chemistry
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character: Professor John Smith
topic: Bioaccumulation of Heavy Metals in Food Chains
grade: 12
subject: Chemistry
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character: Dr. Lisa Wong
topic: Chemical Analysis of Marine Sediments
grade: 12
subject: Chemistry
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