character: Mr. Johnson
topic: Chemical Reactions and Their Impact on the Environment
grade: 9
subject: Chemistry
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character: Ms. Rodriguez
topic: The Role of Catalysts in Reducing Pollutants
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Acid Rain and Its Effects on Aquatic Ecosystems
grade: 9
subject: Chemistry
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character: Mr. Smith
topic: Greenhouse Gases: Sources and Solutions
grade: 9
subject: Chemistry
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