

I guess warm breath rises, you can see it in winter when your breath is visible.
However, co2 is not present as a gas in your body, but bound to hemoglobin, so I think it only becomes a gas again in your lungs. Same as farts only forming “outside” your body in your intestines.



Some examples from flemish (belgian dutch) to dutch:
I remember the first time in a swimming pool in flanders I was so confused by all the signs saying I shouldn’t walk.