character: Bill Nye
topic: The Greenhouse Effect
grade: 11
subject: Chemistry
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character: NASA
topic: Greenhouse Gases and Global Warming
grade: 11
subject: Chemistry
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character: Al Gore
topic: Climate Change and its Impact
grade: 11
subject: Chemistry
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character: Carl Sagan
topic: The Role of Greenhouse Gases in Climate
grade: 11
subject: Chemistry
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