addition to the problem of cigarette addiction, we must not forget the harm caused by each cigarette.
Smoking a cigarette is to absorb and put into the body (lung, larynx, mouth) the product of combustion, designed by engineers for the administration of nicotine is ultrafast.
The big problem in itself, is that the administration of nicotine as a stream of air from combustion, is "that" which is the product of combustion and is associated with the "CO2" and "CO" of the combustion products .
carbon monoxide "CO" is the worst competition of the oxygen we need to breathe.
Most drownings occur in the internal lock that causes carbon monoxide, not that there is no oxygen, which if any, but if carbon monoxide preference exercises the chemical and is absorbed by the oxygen.
The "CO" carbon monoxide is 240 times more affinity with the hemoglobin of the blood oxygen.
And this is the fundamental reason that is as damaging a single cigarette.
The human body reacts quickly and to oxygenate the cells rapidly up the circulatory rhythm actually "smoking" raises the heart rate and thus their risk of premature wear and the risk of failure.