character: Mr. John Miller
topic: Environmental Chemistry of Refrigerants
grade: 12
subject: Chemistry
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character: Ms. Sarah Johnson
topic: Impact of Refrigerants on Climate Change
grade: 12
subject: Chemistry
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character: Dr. Emily Carter
topic: Alternatives to Traditional Refrigerants
grade: 12
subject: Chemistry
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character: Mr. David Smith
topic: Regulations on Refrigerant Use
grade: 12
subject: Chemistry
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