character: Ms. Emily Johnson
topic: Chemical Analysis in Water Treatment
grade: 12
subject: Chemistry
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character: Dr. Alan Smith
topic: Water Quality Assessment Techniques
grade: 12
subject: Chemistry
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character: Professor Linda Green
topic: Chemistry of Pollutants in Drinking Water
grade: 12
subject: Chemistry
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character: Mr. John Davis
topic: Environmental Impact of Water Treatment Processes
grade: 12
subject: Chemistry
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