character: Lake Guardian
topic: Impact of Pollution on Freshwater Ecosystems
grade: 9
subject: Science
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character: Environmental Scientist
topic: Effects of Nutrient Runoff on Lakes
grade: 9
subject: Science
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character: Aquatic Biologist
topic: Biodiversity Loss in Polluted Freshwater Systems
grade: 9
subject: Science
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character: Ecologist
topic: Restoration Efforts for Polluted Rivers
grade: 9
subject: Science
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