According to statistics, the risk of lung cancer from long-term smoking is about 20 times higher than that of lifelong non-smokers, and the cumulative risk of lung cancer from heavy long-term smoking is as high as 30%, while the risk of lung cancer from non-smokers is much lower. The risk of lung cancer from smoking is higher, while the risk of lung cancer from never smoking is significantly lower. However, it is important to remember that smoking is a major factor in the development of lung cancer. In addition to smoking, other factors can also cause lung cancer, such as frying fumes, air pollution, and other environmental pollution, which can also cause an increased risk of lung cancer. In addition, those who have tumor patients in their families or those who work in harmful environments, such as coal miners and miners, are still at high risk for lung cancer even if they do not smoke. In particular, people with special jobs, coupled with heavy smoking, can lead to a greatly increased risk of lung cancer.