I smoked cigs around 2 packs a day sometimes more for 32 years. 4.5 years ago I quit cold turkey. I hate them now. Tobacco smoke makes me feel sick and ill now and I despise it. The whole time I smoked I always had bronchial/lung ailments, especially in winter. Every year I had to go to the dr, get a shot in the ass and 5 day antibiotic along with kick ass cough medicine that knocked me out at nite. I was always having colds, felt bad, couldn't breathe. Sounded wheezy when I laughed and one day I just decided I was tired of the smell, the sickness, the expense and just stopped. I have smoked weed steadily since I was around 12 and now I am 49 and it never makes me feel like the cigs did, I don't have all those health problems, I don't feel short of breath and I feel completely fine. I am sure adding fire and smoking something combustible may up the chances but one thing I have found is smoking joints does not make me feel bad like smoking cigs!! I'd like to see some real statistics and not just scare tactics to make people stop inhaling the "evil weed".