character: Dr. Evans
topic: Impact of Pollution on Freshwater Habitats
grade: 9
subject: Science
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character: Ms. Carter
topic: Effects of Eutrophication on Aquatic Life
grade: 9
subject: Science
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character: Mr. Thompson
topic: Water Quality Assessment Techniques
grade: 9
subject: Science
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character: Dr. Patel
topic: Conservation Efforts for Freshwater Ecosystems
grade: 9
subject: Science
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