character: Sarah Johnson
topic: Toxicology of Heavy Metals in Water Environments
grade: 12
subject: Chemistry
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character: Dr. Emily Carter
topic: Effects of Heavy Metal Pollution on Aquatic Life
grade: 12
subject: Chemistry
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character: Professor Mark Lewis
topic: Methods for Analyzing Heavy Metals in Water Samples
grade: 12
subject: Chemistry
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character: Dr. David Smith
topic: Regulatory Standards for Heavy Metals in Drinking Water
grade: 12
subject: Chemistry
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