Not sure why you persist in letting us know that there are other forms of pollution. We know that, the smoking ban is mostly to do with the incovenience to others. I don't care how harmless the smoke is, it's the smell I can't stand and the general uncomfortable atmosphere it creates, the stink on my clothes and hair, the reek of the smokers themselves, even when not actually smoking (do they know how bad they smell?). The selfishness, they even gas their own kids in their cars, the down right arrogance. they forced this on themselves, enjoy.