character: Carl Sagan
topic: Exploration of Atmospheric Layers
grade: 11
subject: Chemistry
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character: Carl Sagan
topic: Impact of Weather Systems on Climate
grade: 11
subject: Chemistry
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character: Carl Sagan
topic: Chemistry of the Atmosphere
grade: 11
subject: Chemistry
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character: Carl Sagan
topic: The Role of Gases in Atmospheric Layers
grade: 11
subject: Chemistry
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