character: Mr. John Smith
topic: Effects of Water Quality on Ecosystems
grade: 12
subject: Chemistry
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character: Dr. Emily Johnson
topic: Impact of pH Levels on Aquatic Life
grade: 12
subject: Chemistry
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character: Mrs. Sarah Connor
topic: Nutrient Pollution and Algal Blooms
grade: 12
subject: Chemistry
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character: Mr. Alex Turner
topic: Chemical Contaminants in Water Bodies
grade: 12
subject: Chemistry
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