Cigarette smoke is made of a mixture of gas and dust. According to the World Health Organization (WHO), in cigarette smoke have about 4,000 chemicals, of which 40 are classed as carcinogens [1]. contains substances such as nicotine, carbon monoxide, tar and benzene, formaldehyde, ammonia, acetone, arsenic, hydrogen cyanide affect the entire nervous system, vascular and endocrine cause of cardiovascular disease, memory loss and the cancer.
Particularly in Vietnam, each year 40,000 people die from causes related to tobacco, 3 times the number of deaths due to traffic accidents. A survey shows that over 50% of men smoke and 60% of children aged 13-15 Vietnam were exposed to secondhand smoke at home. In Hanoi, nearly half the population to passive smoking, mostly women and children [2]. Lung cancer is the highest form of cancer in men and fourth in women.
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