Today totally it is demonstrated that certain substances, as the nicotine or the tar and the carbon monoxide are dangerous for the health. The cancerigenic and irritating compounds of tar are responsible for the respiratory pathology of the smokers, whereas the nicotine and the carbon monoxide are responsible for the increase of the cardiovascular risk. Against the consumption of other drugs the drogodependencia of the smoked tobacco presents/displays in addition a serious disadvantage, since, not only mine the health of the users, but also, of the people of the surroundings, who involuntarily inhale the smoke of the tobacco. Most of the smoke that inhales the smokers liabilities comes from the call second class current that is originated when the cigarette, pure or pipe is consumed by itself without mediating aspiration of the smoker. The analysis of the second class current has shown current that the concentration of certain cancerigenic substances is far beyond the found one in the main current or of smoke that is generated when the smoker aspires and who he circulates through cigarette until arriving at the mouth.

On the other hand, it has been possible to need that a passive smoker that one is exposed to the smoke of the tobacco during one hour, can get to yes inhale the amount equivalent to the consumption of two or three cigarettes, depending that, of the amount of environmental smoke and the ventilation of the premises. All this means that in certain cases the passive smoker can be exposed to the action of amounts superiors of injurious components of the tobacco to which the own active smoker is exhibited. One calculates that in Spain there would be about five million nonsmokers who passively inhale an amount of minimum smoke equivalent as to the consumption of three to six cigarettes. Concentrating in the relation passive tobacco addiction and cancer, some recent works have shown that the children of parents smokers present/display a risk of suffering cancer a 50 percent greater than the children of parents nonsmokers. Unquestionably, the passive smoker who undergoes the whip of the tobacco more is without a doubt the boy who is forming in the maternal cloister. He does a few of years have begun to blow ” new aires” without tobacco smoke, and, against all odds, the application of the Law Antitabaco has started up. The smokers liabilities hope that with the announced hardening of this Law ” arrives; air prometido” , after more than five centuries of submission to the tobacco smoke, and, that is respected the right to breathe air noncontaminated with tobacco smoke in places public and the labor scope. Although, as the poet said: ” The end/is not known until final”.