Q6 Since neither a snuff nor a chewing tobacco affects lungs, doesn't it become a lung cancer? A The risk of development of symptoms of the cancer by the cigarette is not only a lung cancer. If a smoking person is compared with a non-smoking person, as for the risk of development of symptoms of cancer, smoking persons are high about all cancers. The report called 4.13 times about a lung cancer is made. However, the risk of a laryngeal cancer is the highest of all cancers. It reaches by 20.33 times the non-smoking person. Since the ingredient of tobacco adheres certainly rather than lungs in the place, we are convinced. The development-of-symptoms ingredient of the cancer included in a cigarette is not limited with a Benzpyrene. Nicotine itself is not the direct cause. But it is participating in development of symptoms of cancer. Smoking by the snuff or the chewing tobacco has a risk larger than the ordinary smoking method to a mouth pharyngeal cancer or a laryngeal cancer. We judge so. Moreover, it cannot be declared that these smoking methods are completely unrelated to a lung cancer, either.