导致肺癌发病的首要因素依然是吸烟,包括一手烟、二手烟和三手烟。其次,人口老龄化、空气污染、室内小环境污染、环境和职业致癌因素,以及性格心理因素等也是肺癌发病的重要相关因素。可以讲,肺癌就是一种“被气出来的人造疾病”。 The primary factors that contribute to the development of lung cancer are still smoking, including first-hand smoke, secondhand smoke and third-hand smoke. Second, population aging, air pollution, indoor environmental pollution, environmental and occupational carcinogenic factors, and personality and psychological factors are also important factors in the pathogenesis of lung cancer. It can be said that lung cancer is an “artificial disease that is out of breath.”