character: Professor Davis
topic: Impact of Urbanization on Soil Quality
grade: 9
subject: Geography
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character: Dr. Emily Chen
topic: Soil Erosion in Urban Areas
grade: 9
subject: Geography
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character: Mr. John Smith
topic: Effects of Pollution on Urban Soil
grade: 9
subject: Geography
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character: Ms. Sarah Lee
topic: Sustainable Urban Development and Soil Health
grade: 9
subject: Geography
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