character: Mr. John Smith
topic: Chemical Properties of Soil and Their Impact on Ecosystems
grade: 12
subject: Chemistry
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character: Dr. Emily Carter
topic: Soil pH and Its Effects on Plant Growth
grade: 12
subject: Chemistry
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character: Professor Michael Lee
topic: Nutrient Cycling and Soil Chemistry
grade: 12
subject: Chemistry
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character: Ms. Sarah Johnson
topic: The Role of Soil in Carbon Sequestration and Climate Change
grade: 12
subject: Chemistry
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