character: Mr. White
topic: The Impact of Soil Degradation on Ecosystems
grade: 9
subject: Science
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character: Ms. Green
topic: The Role of Soil in Ecosystem Health
grade: 9
subject: Science
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character: Dr. Brown
topic: Conservation Techniques for Soil Preservation
grade: 9
subject: Science
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character: Mr. Johnson
topic: Effects of Soil Erosion on Biodiversity
grade: 9
subject: Science
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