character: Dr. Lisa Nguyen
topic: Effects of Nutrients on Freshwater Habitats
grade: 9
subject: Chemistry
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character: Dr. Sarah Kim
topic: Impact of Chemical Pollution on Aquatic Life
grade: 9
subject: Chemistry
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character: Professor James Lee
topic: The Role of pH in Freshwater Ecosystems
grade: 9
subject: Chemistry
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character: Dr. Emily Watson
topic: Nutrient Cycling in Freshwater Bodies
grade: 9
subject: Chemistry
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