character: Dr. Sarah Green
topic: Impact of Soil Erosion on Agriculture
grade: 9
subject: Geography
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character: Mr. John Carter
topic: Soil Conservation Techniques
grade: 9
subject: Geography
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character: Ms. Emily Roberts
topic: The Role of Vegetation in Preventing Soil Erosion
grade: 9
subject: Geography
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character: Professor Alan Smith
topic: Effects of Erosion on Crop Yield
grade: 9
subject: Geography
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