character: Mr. Lee
topic: Innovative Filtration Systems for Clean Water
grade: 11
subject: Chemistry
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character: Ms. Smith
topic: Sustainable Water Management Techniques
grade: 11
subject: Chemistry
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character: Dr. Adams
topic: Chemical Principles in Water Purification
grade: 11
subject: Chemistry
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character: Mrs. Johnson
topic: Water Quality Analysis in Chemistry
grade: 11
subject: Chemistry
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