character: Ms. Robinson
topic: Effects of Water Contaminants on Human Health
grade: 11
subject: Chemistry
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character: Dr. Smith
topic: Chemical Toxins in Drinking Water
grade: 11
subject: Chemistry
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character: Mr. Johnson
topic: Impact of Heavy Metals in Water on Public Health
grade: 11
subject: Chemistry
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character: Ms. Lee
topic: Water Purification Techniques and Their Efficacy
grade: 11
subject: Chemistry
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