Replies

To: PROCON

Dont we breathe and exhale CO2? - Just more in % on the exhale side?

40 posted on 04/20/2017 12:41:30 PM PDT by freedomlover

To: freedomlover

Our atmosphere that we breathe is made-up of 78% nitrogen, 21% oxygen and then 2% other trace gases.

41 posted on 04/20/2017 12:47:21 PM PDT by PROCON

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