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4 June, 22:54

The air we inhale contains less than 1% carbon dioxide.

Approximately what percentage of carbon dioxide is there in the air we

exhale?

A) 1%

B) 4%

C) 16%

D 20%

+1
Answers (1)
  1. 5 June, 02:50
    0
    B. 4%
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