那么,引起癌症的原因有哪些呢? 致癌的因素较多,主要有以下几点: 1、吸烟。中国目前有3亿2千万烟民,男性3亿、女性2千万,女性有增长的趋势。中国在1990年因吸烟导致疾病死亡人数占总死亡人数的12％。据推测,30年后,即2030年将增至33％。据报道,因吸烟而致肺癌是不吸烟者的10倍—13倍。吸烟还可致口腔癌、口咽癌、喉癌、鼻咽癌、气管癌、支气管肺泡癌、肝 So, what are the causes of cancer? Carcinogenic factors are more, mainly the following points: 1, smoking. There are currently 320 million smokers in China, with 300 million men and 20 million women. Women have a growing trend. In 1990, the number of deaths caused by smoking in China accounted for 12% of the total deaths. It is speculated that after 30 years, 2030 will increase to 33%. According to reports, lung cancer caused by smoking is 10 times to 13 times that of non-smokers. Smoking can cause oral cancer, oropharyngeal cancer, laryngeal cancer, nasopharyngeal cancer, tracheal cancer, bronchoalveolar carcinoma, liver