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统计资料表明,肺癌的绝对发病率每10～15年增加一倍。在许多国家,肺癌已跃居男性恶性肿瘤的第一位。我国北京等城市肺癌发病率和病死率均占各种恶性肿瘤首位。据认为,肺癌日益增多与环境因素密切相关。吸烟引起肺癌已得到公认,那么不吸烟的人又何以会得肺癌呢?大致有以下环境因素。大气污染:大量调查表明,大气污染与居民肺癌发病率和死亡率密切相关,特别是燃煤污染严重地区,肺癌发病率和死亡率显著增加。我国宣威(云南省)农村有室内烧煤习惯,使那里成为我国肺癌高发
Statistics show that the absolute incidence of lung cancer doubles every 10 to 15 years. In many countries, lung cancer has leapt to the top of male malignancy. The incidence and mortality of lung cancer in cities such as Beijing, China, account for the first place in all types of malignant tumors. It is believed that the increasing incidence of lung cancer is closely related to environmental factors. Smoking causes lung cancer has been recognized, then why do non-smokers get lung cancer? There are generally the following environmental factors. Air pollution: A large number of surveys have shown that air pollution is closely related to residents’ lung cancer incidence and mortality. Particularly in areas with serious coal-burning pollution, lung cancer incidence and mortality have increased significantly. China’s Xuanwei (Yunnan Province) has the habit of burning coal in rural areas, making it a high incidence of lung cancer in China