GHG Management

What is the approximate concentration of CO2 (by volume) in human breath?

1%
5%
10%
15%

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Correct Answer
5%

And here's something for you to take back

So, when you inhale, the concentration is about 0.04% (420 PPM) but after CO2 exchange in the lungs, the exhalation has a CO2 concentration that is over 100 fold that of the inhalation

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