character: Professor John Earthman
topic: Environmental Effects on Soil
grade: 9
subject: Science
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character: Dr. Greenfield
topic: Impact of Pollution on Soil Health
grade: 9
subject: Science
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character: Ms. Soilman
topic: Soil Conservation Techniques
grade: 9
subject: Science
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character: Professor Flora
topic: Plants and Soil Interactions
grade: 9
subject: Science
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