Re: lung capacity determines how much smoke is produced
I think it depend on how you breath.
Musicians (like myself)
Singers and athletic people Breath Differently then normal people do.
In essence we breath differently because we've trained our bodies to get as much oxygen with little force, singers and musicians ofter use breathing exercises and technique to get greater volumes of air in a minimal amount of time.
Breathing more from out Diaphram and not using our lungs but our muscles to do most of the work.
This is just a theory on why we might get bigger clouds.
Even if your not a musician or and athelete your might breath different from normal people.
It's HOW you breath, not how much you take in.