character: Phosphorus Runoff
topic: Impact on Aquatic Ecosystems
grade: 9
subject: Biology
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character: Nutrient Pollution
topic: Causes and Effects
grade: 9
subject: Biology
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character: Algal Blooms
topic: Connection to Phosphorus Levels
grade: 9
subject: Biology
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character: Eutrophication
topic: Consequences of Nutrient Overload
grade: 9
subject: Biology
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