character: Mr. David Chen
topic: Effects of Industrial Waste on Water Quality
grade: 11
subject: Chemistry
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character: Dr. Emily Carter
topic: Chemical Properties of Pollutants in Water
grade: 11
subject: Chemistry
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character: Ms. Sarah Johnson
topic: Impact of Runoff on Aquatic Ecosystems
grade: 11
subject: Chemistry
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character: Mr. Robert Smith
topic: Water Treatment Processes and Contaminant Removal
grade: 11
subject: Chemistry
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