character: Environmental Scientist
topic: Pollution Effects on Water Quality
grade: 9
subject: Science
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character: Aquatic Biologist
topic: Impact of Contaminants on Aquatic Life
grade: 9
subject: Science
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character: Hydrologist
topic: Water Cycle and Pollution Contribution
grade: 9
subject: Science
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character: Ecologist
topic: Effects of Nutrient Runoff on Freshwater Ecosystems
grade: 9
subject: Science
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