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26 February, 23:47

About how much of Earth's atmosphere is oxygen?

35%

21%

50%

78%

+2
Answers (2)
  1. 27 February, 00:02
    0
    Earth's atmosphere is made up of 21% of oxygen
  2. 27 February, 02:34
    0
    Nitrogen takes up 78% of the atmosphere, Oxygen takes up 21% of the atmosphere, and the rest is other gases like Methane, and Carbon Dioxide.
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