>>>Are you saying that barbecue smoke from grilling is not a good analogy?
>
>Depends- is the grill in the yard or has somebody fired it up at the next table in a restaurant? Seems to me that people have different expectations re your own back yard vs a restaurant... though FWIW there are many places where it is illegal to light a BBQ or any sort of fire because of atmospheric pollution or fire risk.

Reminds me of the regulation which still makes no sense to me: in Virginia Beach (or the whole Virginia, don't remember the scope of the variable) it's illegal to light it... until 4PM, when it suddenly becomes legal. Mother nature (and father who writes absurd comedies) take care of the it, in a way that at that time of day the fire stops being dangerous.