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世界卫生组织的一份研究报告显示,在人类恶性肿瘤病因中,约有80-90%是由环境因素引起的。目前,公认的致癌因素主要有以下几种:1、空气、水等环境污染。随着工农业的发展,环境污染日趋严重。而环境污染物中有许多是属于致癌物或促癌物,如煤的燃烧,机动车尾气及工业废气都含有致癌物,许多资料都证明工业城市中肺癌死亡率高于非工业城市及农村。
A World Health Organization study shows that about 80-90% of the causes of human malignancies are caused by environmental factors. At present, the recognized carcinogenic factors are mainly the following: 1, air, water and other environmental pollution. With the development of industry and agriculture, environmental pollution is worsening day by day. Many of the environmental pollutants are carcinogens or carcinogens, such as coal combustion, motor vehicle exhaust and industrial emissions contain carcinogens, many data prove that industrial cities in lung cancer mortality is higher than non-industrial cities and rural areas.