To smoke not only is "a habit", also it is a drug addiction, since the fact of smoking tobacco expires with all the criteria that they define to the consumption of a substance as such:
Tolerance existence
Dependency
Withdrawal symptoms in absence of the same one
Compulsive behavior
The maximum responsible for the dependency is the nicotine, substance with a big power of addiction similar to that of other drugs like the heroine or cocaine.
The form of dependency that generates the habit of smoking is:
Physical dependency provoked straight by the nicotine and she is the person in charge of the withdrawal symptoms.
Psychological dependency, the habit of smoking has turned into a company in all kinds of situations, after the meals, with the coffee, on having spoken by phone, etc..., and it seems impossible to change this relation.
Social dependency, smoking keeps on being a social act, it is done in groups, in certain meetings of free time, after dinners with the friends, and especially it keeps on being a habit that distinguishes certain groups of adolescents giving them a social value of rebelliousness and of ripeness misunderstandings.
The principal one is that the tobacco consumption constitutes the principal cause of avoidable illness and of mortality prevenible in the developed country. In 19 % of the cases of mortality the tobacco is the cause of his prevention.
In the tobacco there have been multiple substances that largely are harmful to the health. Between them, they stand out for his harmful effects:
The tars (benzopirenos and nitrosaminas) responsible for 30 % for all the types of cancer (bladder, kidney, pancreas, stomach, etc.), and of 90 % of the cancer of lung.
The carbon monoxide, which is the causer of more than 15 % of the cardiovascular diseases.
The nicotine, which produces the physical dependency.
Also the tobacco is the causer of 80 % of the mortality for chronic pulmonary processes.
WHY DOES HE SMOKE? 
WHY DOES HE SMOKE?
