character: Dr. Sarah Thompson
topic: Effects of pollution on freshwater ecosystems
grade: 10
subject: Biology
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character: Dr. Emily Raines
topic: Impact of agricultural runoff on rivers
grade: 10
subject: Biology
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character: Professor Mark Lee
topic: Bioindicators in freshwater pollution assessment
grade: 10
subject: Biology
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character: Dr. Lisa Chen
topic: The role of wetlands in filtering pollutants
grade: 10
subject: Biology
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