character: Mrs. Linda Green
topic: Human Activities and the Phosphorus Cycle
grade: 9
subject: Biology
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character: Mr. John Smith
topic: Impact of Agriculture on Nutrient Cycles
grade: 9
subject: Biology
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character: Dr. Emily Johnson
topic: Eutrophication and Water Quality
grade: 9
subject: Biology
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character: Ms. Rachel Adams
topic: Phosphorus Sources in Urban Areas
grade: 9
subject: Biology
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