character: Mr. James Turner
topic: Analysis of Water Contaminants and Their Effects
grade: 12
subject: Chemistry
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character: Dr. Emily Watson
topic: Impact of Heavy Metals in Drinking Water
grade: 12
subject: Chemistry
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character: Ms. Sarah Lee
topic: Chemical Properties of Common Water Pollutants
grade: 12
subject: Chemistry
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character: Mr. Robert Chen
topic: Water Treatment Methods and Their Efficacy
grade: 12
subject: Chemistry
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