character: Phosphorus
topic: Role in Eutrophication
grade: 9
subject: Biology
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character: Algae
topic: Growth from Nutrient Runoff
grade: 9
subject: Biology
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character: Water Bodies
topic: Impact of Nutrient Loading
grade: 9
subject: Biology
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character: Oxygen Levels
topic: Effects of Algal Blooms
grade: 9
subject: Biology
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