My mom's mother died last year at 100. It was the generations that grew up in the 40's through the 60's that smoked. They're the ones only living into their 60's and 70's. If you tell a smoker that they smell like smoke, they don't believe you. They insist you are just saying that to get them to stop smoking.
Smokers are litterbugs.
Take some time and watch a smoker who is driving. Invariably, they will toss the butt out the window. They all sincerely believe that cigarettes are biodegradable. As far as the number of items, cigarette butts probably outnumber all other litter combined by at least a hundred to one. Look around the ground where the smokers at work spend their breaks.