character: Ms. Rachel Green
topic: Waterborne Diseases
grade: 12
subject: Chemistry
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character: Dr. John Watson
topic: Chemical Contaminants in Water
grade: 12
subject: Chemistry
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character: Professor Mike Lawson
topic: Impact of pH Levels on Waterborne Pathogens
grade: 12
subject: Chemistry
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character: Ms. Sarah Connor
topic: Water Purification Methods
grade: 12
subject: Chemistry
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