character: Dr. James
topic: Effects of CFCs on Ozone Layer
grade: 11
subject: Chemistry
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character: Dr. Emily
topic: Ozone Depletion and Climate Change
grade: 11
subject: Chemistry
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character: Professor Smith
topic: Chemical Reactions Involving CFCs
grade: 11
subject: Chemistry
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character: Ms. Taylor
topic: Impact of Human Activities on the Atmosphere
grade: 11
subject: Chemistry
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