character: Ms. Sarah Johnson
topic: Chemical Reactions in Water Pollution
grade: 11
subject: Chemistry
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character: Dr. Emily Carter
topic: Impact of pH Levels on Aquatic Life
grade: 11
subject: Chemistry
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character: Mr. John Smith
topic: Biodegradation of Pollutants in Water
grade: 11
subject: Chemistry
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character: Ms. Lisa Tran
topic: Heavy Metals and Their Effects on Water Quality
grade: 11
subject: Chemistry
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