character: NASA Scientists
topic: NASA's Role in CFCs and Ozone Layer Monitoring
subject: Science
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character: Environmental Scientists
topic: Impact of CFCs on the Ozone Layer
subject: Science
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character: Atmospheric Chemists
topic: Ozone Depletion and CFCs: Monitoring and Research
subject: Science
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character: Climatologists
topic: Global Effects of Ozone Layer Depletion
subject: Science
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