character: Bill Nye
topic: Greenhouse Gases and Their Effects
grade: 9
subject: Chemistry
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character: Neil deGrasse Tyson
topic: Climate Change and Its Impact on Earth
grade: 9
subject: Chemistry
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character: David Attenborough
topic: The Science of Climate Change
grade: 9
subject: Chemistry
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character: Carl Sagan
topic: The Greenhouse Effect and Planetary Climate
grade: 9
subject: Chemistry
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