character: Ms. Jones
topic: Alternative Compounds to CFCs
grade: 11
subject: Chemistry
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character: Mr. Smith
topic: Impact of CFCs on the Ozone Layer
grade: 11
subject: Chemistry
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character: Dr. Lee
topic: Environmental Chemistry and Green Alternatives
grade: 11
subject: Chemistry
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character: Prof. Tan
topic: Regulations on CFC Usage and Alternatives
grade: 11
subject: Chemistry
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