character: Ms. Yellow
topic: Water Treatment Methods and Their Effectiveness
grade: 11
subject: Chemistry
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character: Mr. Green
topic: Chemical Processes in Water Purification
grade: 11
subject: Chemistry
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character: Dr. Blue
topic: Comparing Filtration Techniques for Water Treatment
grade: 11
subject: Chemistry
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character: Mrs. White
topic: Impact of Water Treatment on Public Health
grade: 11
subject: Chemistry
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