character: Ms. Davis
topic: Chemical Treatments for Contaminated Water Sources
grade: 11
subject: Chemistry
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character: Dr. Roberts
topic: Advanced Water Purification Techniques
grade: 11
subject: Chemistry
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character: Professor Smith
topic: Environmental Chemistry and Water Quality
grade: 11
subject: Chemistry
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character: Mr. Thompson
topic: Impact of Pollutants on Water Resources
grade: 11
subject: Chemistry
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