character: Carbon Dioxide
topic: Role in Climate Change
grade: 11
subject: Chemistry
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character: Greenhouse Gases
topic: Impact on Global Warming
grade: 11
subject: Chemistry
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character: Fossil Fuels
topic: Contribution to Carbon Emissions
grade: 11
subject: Chemistry
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character: Climate Change
topic: Effects of Increased CO2 Levels
grade: 11
subject: Chemistry
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