character: Mr. Thompson
topic: Chemical Reactions in Landfills
grade: 12
subject: Chemistry
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character: Dr. Smith
topic: Biodegradation Processes in Landfills
grade: 12
subject: Chemistry
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character: Ms. Johnson
topic: Impact of Landfill Chemicals on Soil and Water
grade: 12
subject: Chemistry
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character: Prof. Lee
topic: Chemical Composition of Landfill Waste
grade: 12
subject: Chemistry
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