In nine out of ten cases, lung cancer is fatal within 5 years of diagnosis. Smoking causes more than lung cancer, it also causes cancer of the lip, mouth, throat, bladder, kidney and pancreas. It is associated with cancer of the cervix as well. More and more cities are severely limiting smoking in public places. When smoking is allowed in a workplace, the smoking room must be separately ventilated to prevent contamination of the rest of the workplace air.
Children are very susceptible to respiratory problems due to second hand smoke.
Childhood asthma has dramatically increased in recent years. If you smoke and quit, your risk of getting lung cancer will not drop to the level of someone who never smoked. However, a recent study indicates that your risk will drop significantly if you quit smoking before age 35. The earlier you quit, the better. The best strategy for preventing smoking-related cancer is to never smoke at all.