character: Mr. Alex Harper
topic: Nutrient Cycling in Ecosystems
grade: 9
subject: Chemistry
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character: Dr. Emily Carter
topic: Photosynthesis and its Role in Nutrient Cycling
grade: 9
subject: Chemistry
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character: Ms. Sarah Thompson
topic: The Impact of Decomposers on Nutrient Cycling
grade: 9
subject: Chemistry
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character: Mr. John Smith
topic: Human Impact on Ecosystem Nutrient Cycles
grade: 9
subject: Chemistry
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