If I'm not mistaken, I saw it here a couple years ago, that to be able to inhale the equivalent of ONE cigarette by sitting next to someone smoking, that you'd have to sit there for 48 straight hours.
They just don't know when to stop.
Yep. It’s all about PPM. And the ppm in a single puff inhaled from a cigarrette is staggering compared to what you get in a smoke filled bar.
And here’s the thing: All of your ograns that are used to clean the air, liquid and food you ingest are like a big HVAC system. As long as you use it within its design parameters you are golden. You are only in trouble when you overtax it (e.g. smoking or drunken stupor) or ingest chemicals that it is not designed to handle (e.g. antifreeze or cyanide).
FWIW, I say this as someone who hates cigarrette smoke.