Smoking causes lung cancer already by extensive and accepted. But, such situation can encounter however in the life: Somebody does not smoke to die at lung cancer however, somebody all the day blow a cloud is macrobian also however; A pair of couples of living conditions similar, the wife that does not smoke dies prematurely at lung cancer, and the man that smokes for a long time is happy however enjoy natural span of life; Somebody did not contract lung cancer during smoking, and lung cancer contracted however after smoke of Buddhist monastic discipline. Wait a moment so, do so that people baffles greatly.

Why can although be the main pathogeny of lung cancer,the person that do not smoke also smoke at lung cancer to death, but be not only pathogeny. The element related to its still has at least: The profession sends cancerous gene, air toxin of infection of element of radiate of pollution, ionization, food, virus, fungus, endocrinopathy, familial heredity. The happening of lung cancer is much element the result of joint action, do not smoke to be equal to smoke without passivity, do not be equal to the other without bring into contact with factors that cause cancer. Lung cancer cent is 4 kinds, among them the commonnest scale cancer and smoking relationship are the closest, the person that contract cellule cancer has smoking history more, the lung cancer of the person that do not smoke is gland cancer and big cell cancer more.

Somebody smokes why to to get lung cancer all the day this and each one constitution are different about. The carcinogenic substance that lung cancer causes in aerosol is benzene and Bi kind, it must pass human body inside one kind is called the material with enzymatic alkylation to machine processing ability to produce the effect that cause cancer. This kind of enzymatic energy is high person incidental cancer, and vigor person contract cancer not easily. Additional, here still has a statistical problem. Epidemiology investigation needs big sample book, and the object of one individual contact is finite after all. There are 10 to get cancer only in 100 smoke person that you know, do not think the sicken rate of lung cancer is 10 ％ can simply, and want statistic by tens of thousands person ability gets accurate verdict.

Why does the person that some passivity smoke give birth to lung cancer to investigate discovery, there should be a person to smoke in great quantities only in the couple, the gender meets the risk that another person contracts lung cancer to increase greatly. Because him person that the content of cancerous medicine compares smoking is sent to want inspiratorily in cigarette smoke,this is 50 times taller above. Investigation returns discovery, the woman that does not smoke gets married with the person that smoke, the dangerous sex that its contract lung cancer is with the person that do not smoke of marrier.

Although passive smoking is only inspiratory a few aerosol, but the content of among them noxiousness chemistry material is considerable. Visible, it is not strange that the person that passivity smokes gets lung cancer easily also.

Smoke of Buddhist monastic discipline causes lung cancer pure belong to eyewash smoking to cause lung cancer to need 20 ～ 30 years commonly or longer time. Cadaver check discovers, the person that do not smoke is epithelial appear unusual change occupy 67 ％ unripely, and the person that smoke for a long time is as high as 98 ％ . The respiratory tract after smoke of Buddhist monastic discipline is epithelial is can slow unusually those who return to normal, but reduce the rate that produces lung cancer to depend on again the circumstance that smoked in the past. Somebody after smoke of Buddhist monastic discipline

Before long the lung cancer of place happening and itself of smoke of Buddhist monastic discipline are without a relation, is the coincidence on time only, it is the evil consequence that place of long-term and many smoking accumulates, although not smoke of Buddhist monastic discipline can produce lung cancer as much, still perhaps can happen a few earlier.

(responsibility edits: Wang Haie)