Before we are going to smoke, it is better to look at the fact. About 50 thousands people die every year in Britain as direct result of smoking. This is seven times as many as die in road accidents. Nearly a quarter of smokers die because of diseases caused by smoking.
Ninety percent of lung cancers are caused by smoking. If we smoke five cigarettes a day, we are six times more likely to die of lung cancer than a non smoker. If we smoke twenty cigarettes a day, the risk is nineteen greater. Ninety five percent of people who suffer of bronchitis are people who are smoking. Smokers are two and half times more likely to die of heart disease than non smokers.
Additionally, children of smoker are more likely to develop bronchitis and pneumonia. In one hour in smoky room, non smoker breathes as much as substance causing cancer as if he had smoked fifteen cigarettes.
Smoking is really good for tobacco companies because they do make much money from smoking habit. Smoking however is not good for every body else :)