character: Ms. Johnson
topic: Water Contamination Solutions
grade: 11
subject: Chemistry
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character: Mr. Smith
topic: Impact of Industrial Waste on Water Quality
grade: 11
subject: Chemistry
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character: Dr. Patel
topic: Bioremediation Techniques for Water Purification
grade: 11
subject: Chemistry
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character: Ms. Davis
topic: Chemical Treatments for Contaminated Water Sources
grade: 11
subject: Chemistry
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