It is really unbelievable about the people who have posted messages mentioning all the other foul odors, too much perfume, sweat, body odor, bad breath, etc. but like Stringsinger said, "But none of these will kill you." He is right!
(Bath daily, use deodorant, brush your teeth/use mouth wash, wash your dirty clothes, etc.)

Although very offensive of course - none of those other things can effect another one's lungs (never heard of 2nd hand perfume, 2nd hand bad breathe,2nd hand sweat, effecting people's health to the extent that one can die from exposure as does 2nd hand smoke!)

I did try to find on-line anywhere where these other offensive odors can actually cause someone to get cancer as 2nd hand smoke does - but have not found any conclusive studies.

Smoking should be banned 100 % everywhere in this world. There is not anything beneficial that comes from smoking. It is a terrible, terrible habit.
Yes, I used to be a smoker too. Never heavy - about 4 or 5 cigarettes a day at the most but so glad that I quit in the early 1980's.
Geez, I don't any know how people can afford them nowadays!
Just think of the extra money one would have if they didn't smoke.
Wonder if smokers have ever tried to calculate what they spend a year on cigarettes? Probably not, but if one sat down and tried to get an actual figure as to the amount they spend on cigarettes a year would probably be astounded.   

I am glad that I live in a state where it is banned in all public places. Only place I have to sometimes be near smokers is at bus stops.I do my best to try and move some distance away but don't want to miss my bus either so I can only move so far away if someone at the bus stop is smoking. Of course there is no smoking allowed on public transportation and that includes E. cigarettes. where I live.