character: Ms. Adams
topic: Ozone Layer Depletion
grade: 12
subject: Chemistry
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character: Dr. Smith
topic: Impact of CFCs on Ozone Layer
grade: 12
subject: Chemistry
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character: Mr. Johnson
topic: Greenhouse Gases and Climate Change
grade: 12
subject: Chemistry
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character: Ms. Lee
topic: Chemistry of Ozone Formation and Depletion
grade: 12
subject: Chemistry
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