character: Dr. Elena Smith
topic: Ecologist and Freshwater Ecosystems
grade: 9
subject: Geography
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character: Professor John Anderson
topic: Impact of Urban Pollution on Rivers
grade: 9
subject: Geography
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character: Lisa Tran
topic: Effects of Agricultural Runoff on Freshwater Biodiversity
grade: 9
subject: Geography
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character: Mark Patel
topic: Conservation Efforts in Polluted Lakes
grade: 9
subject: Geography
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