character: Ms. Johnson
topic: Effects of Acid Rain on Soil Microorganisms
grade: 11
subject: Chemistry
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character: Mr. Smith
topic: Impact of pH Levels on Soil Health
grade: 11
subject: Chemistry
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character: Dr. Lee
topic: Microbial Diversity in Different Soil Types
grade: 11
subject: Chemistry
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character: Ms. Adams
topic: The Role of Soil Microorganisms in Nutrient Cycling
grade: 11
subject: Chemistry
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