Earth Day: How much do you know about climate change? Take our quiz.
A full moon appears through the blue glow of the Earth's atmosphere, in this photo taken aboard the Space Shuttle Discovery in 1999. (NASA/Reuters/File)
A lot of people have opinions about climate change, but do they really know what they are talking about? Test your knowledge with this quiz.
Question 1 of 10
1. Which of the following is NOT a greenhouse gas?
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Methane |
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Nitrous oxide |
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Argon |
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Ozone |
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