Don't talk like fools guys. You can't point at a 80 yr. old guy who smokes everyday and say that he is still alive. There's a whole new discipline of Risk Assessment which have hundreds of PhD's working their brains out to find the cause and effects of these environmental hazards including things we drink and eat everyday. Results get published and we hear them in different forms- newspaper, medical literature, TV, magazines, Radios etc. If these studies are supported by data and more important facts, try to accept them and don't say live happily and die happily. If you ignore these and just go about doing whatever you feel like, then your death might not occur so happily. Remember we are talking about Chronic (long-term) effects, and it might take 30, 40 or even more years to show up.