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What is the approximate concentration of carbon dioxide in the atmosphere? Select one: 1. 380 parts per million (0.038%) 2. 7300 parts per million (0.73%) 3. 37000 parts per million (3.7%) 4. 13 parts per million (0.0013%)

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Answer:

1. 380 parts per million (0.038%)

Explanation:

By volume, dry air, which makes up the earth's atmosphere is roughly made up of 78.09 % nitrogen gas, 20.95 % oxygen gas, 0.93% argon gas, 0.04% carbon dioxide gas, and trace amounts of other gases. So the answer to this question is the one that is closest to 0.04 %, 1.

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