character: Environmental Scientist
topic: Beaver Dams and Water Quality Improvement
grade: 9
subject: Geography
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character: Geographer
topic: Impact of Dams on Ecosystems
grade: 9
subject: Geography
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character: Hydrologist
topic: Water Quality Monitoring Techniques
grade: 9
subject: Geography
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character: Conservation Biologist
topic: Role of Wetlands in Water Filtration
grade: 9
subject: Geography
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