Quote:
Originally Posted by TorqueDog
He's saying that suggesting most of the exhaust is just water vapour is disingenuous, because it insinuates that the exposure to said exhaust is not harmful because water vapour is not itself harmful. The exhaust is mostly water vapour and water vapour is not harmful, but the minute amount of NOx and PM2.5 present in the rest of the exhaust that isn't water vapour is precisely what makes it harmful.
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I never said that it isn't or can't be harmful. Just that it's water vapour not smoke. In regards to NOx and PM2.5 you would have to have some serious respiratory issues for this to be an issue if you are just walking by. SP has got a little cranky over the years.