character: Environmental Scientist
topic: Water Pollution and Its Impact on Freshwater Ecosystems
grade: 9
subject: Geography
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character: Marine Biologist
topic: Effects of Water Pollution on Marine Life
grade: 9
subject: Geography
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character: Ecologist
topic: The Role of Water Quality in Ecosystem Health
grade: 9
subject: Geography
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character: Geographer
topic: Geographical Distribution of Water Pollution Sources
grade: 9
subject: Geography
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