Answer:
According to the asrticle that I read, smoking causes cancer, heart disease, stroke, lung diseases, diabetes, and chronic obstructive pulmonary disease (COPD), which includes emphysema and chronic bronchitis. Smoking also increases risk for tuberculosis, certain eye diseases, and problems of the immune system, including rheumatoid arthritis.
The ill-effects of smoking on health not only concern the smoker but the entire population living in the same society and sharing the economy. Smoking is associated with a general increase of costs involved with increased morbidity, lowering of the social product and excess mortality.
On average, smokers' life expectancy is 10 years less than non-smokers. The long-lived smokers are the exception and the researchers said that their findings suggest that they may be a "biologically distinct group" that is endowed with genetic variants that allow them to respond differently to exposure.