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character: Human Activities
topic: Impact of Human Activities on the Environment
grade: 11
subject: Chemistry
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character: Sources of CFCs
topic: Chemicals and Their Environmental Impact
grade: 11
subject: Chemistry
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character: Effects of CFCs
topic: Global Warming and Ozone Layer Depletion
grade: 11
subject: Chemistry
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character: CFC Regulations
topic: International Agreements and Policies
grade: 11
subject: Chemistry
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