> The amount of crap you get from momentarily standing near a smoker nearby outside is orders of magnitude less than you get from automobile exhaust walking aro

> The amount of crap you get from momentarily standing near a smoker nearby outside is orders of magnitude less than you get from automobile exhaust walking around a typical city. That is a big claim. In view of the association with passive smoke and SIDS you will need some citations. It should not be hard to find them. Huge efforts have gone into researching causes of SIDS and there should be a good correlation between city vs countryside dwellers if your hypothesis is correct. > When someone is idling their car or truck do you go knock on their window and make a big scene about how they are poisoning your child? When my child was new born I would have moved away from them whilst saying loudly how disgusting they are - exactly the same as I did for smokers. If someone is running their engine for no reason I would probably ask them to turn it off.