[Bring_Back_Shantz]

Originally Posted by GGG

C02 doesn’t create smoke though. It is transparent and from a respiratory standpoint harmless.

It’s the Nox and other particulate that is toxic.

That's not really the point.
He said it's "Mostly" water varour, which besides the fact that it's completely irrelevant to whether or not walking through plumes of exhaust gasses is harmful, it's also, not really true.

Throwing out a statement that is questionable false, and unquestionable irrelevant is useless.

It's like telling a vegetarian that most of their veggie burger isn't meat.
It's not a particularly reassuring statement.