1. Quit smoking: reduce the chance of second-hand smoke. The incidence of lung cancer in long-term smokers is 20-40 times higher than that of non-smokers. It is said that 1 out of every 3 smokers in the world is Chinese. This is why the incidence of lung cancer in China has increased dramatically in the last 50 years. Medical reports also indicate that the risk of lung cancer in heavy smokers (15 cigarettes or more per day) decreases significantly when the amount of cigarettes smoked is cut in half, that the mortality rate from lung cancer decreases when smoking is discontinued, and that the incidence of lung cancer decreases to roughly the same as that of nonsmokers after 10 years of quitting. Other harmful effects of smoking include causing or aggravating heart disease, tracheobronchitis, emphysema, etc. Therefore, there is no benefit to smoking, for the health of you and your family, please stay away from tobacco. 2, efforts to combat air pollution: for air pollution, now more mentioned is PM2.5 (can enter the lung particles), refers to the diameter of particles less than or equal to 2.5 microns, mainly from car exhaust and coal smoke, roughly equivalent to 1/20 of our hair diameter. PM2.5 small mass, rich in toxins, suspended in the air for a long time, because of the small diameter, so can inhale the lung tissue more The more distal it is, the more toxic it is to the human body. In the case of severe pollution, the amount of carcinogens inhaled by residents per day is equivalent to smoking 20 paper cigarettes. Therefore, it is mandatory for the state to publicly monitor PM2.5 values in northern China and the Pearl River Delta by 2015, and there are even rumors that it will be linked to officials’ political performance and career, which is enough to show its importance. Therefore, we advocate walking more and driving less to reduce tailpipe air pollution. When encountering hazy weather, try to reduce outdoor activities, and if you have to go out, you should wear a mask. 3.Family protection: The main protection point of family protection is in the fumes. A study shows that cooking on cookware with poor ventilation systems and very low combustion efficiency can cause health damage equivalent to smoking two packs of cigarettes a day, which leads to 1.6 million deaths worldwide each year. The main carcinogenic effect of grease smoke is the carcinogenic benzo(a)pyrene contained in it. It can lead to chromosome damage in human cells, and long-term inhalation can induce lung tissue carcinogenesis. 4.Occupational protection: Effective protective measures should be taken in mines where radioactive ores are mined, coal mine workers should wear protective masks, and chemical plant workers exposed to environments containing carcinogenic compounds should also have necessary protective measures. 5.Healthy diet: There is a detailed description in the link of what to eat for lung cancer.