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By volume, which of the following comprises more than 1 percent of Earth’s atmosphere? A) carbon monoxide B) chlorofluorocarbons C) ozone D) carbon dioxide E) none of the above

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By volume, which of the following comprises more than 1 percent of Earth’s atmosphere?
A) carbon monoxide
B) chlorofluorocarbons
C) ozone
D) carbon dioxide
E) none of the above

 
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