character: Mr. Lee
topic: Environmental Impact of Soil pH
grade: 9
subject: Chemistry
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character: Mrs. Thompson
topic: Effects of Soil Nutrients on Plant Growth
grade: 9
subject: Chemistry
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character: Dr. Patel
topic: Acid Rain and Its Effects on Soil Health
grade: 9
subject: Chemistry
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character: Ms. Rivera
topic: The Role of Soil in Carbon Sequestration
grade: 9
subject: Chemistry
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