Renovation materials you do not know? With the improvement of people’s living standard, more and more people pay attention to the quality of life, and renovating their homes is something that every family is happy to do, but have you paid attention to these quality issues when selecting the renovation materials? In addition to smoking, environmental factors such as indoor pollution caused by decoration materials are also an important cause of lung cancer. People often overlook a very important point in the process of decoration, that is, indoor environmental pollution, which looks like a beautiful and fashionable living room, but they do not know that it exists around us all the time like an invisible killer, because there are a lot of toxic gases in the materials used for decoration, such as formaldehyde, ammonia, benzene, radon and so on. The latest research results published by the World Health Organization show that indoor radon has become the second major cause of lung cancer after smoking. Radon is a natural radioactive gas, colorless and tasteless, which can be called “invisible smoke”. When radioactive gas like radon enters the human body through the respiratory tract, the first one to be hurt is the lung. The human body cells have the ability of self-repair, and when they have just repaired, they absorb radioactive substances and continue to repair. We all think that after a new house is renovated, there will be formaldehyde, which affects our health. In fact, radon is more terrible than formaldehyde. It is different from volatile gases such as ammonia, formaldehyde and benzene, which will be slowly dissipated over time, while radon is decayed from radium element and is a kind of harmful gas with source. Although there are no relevant research figures on indoor radon and lung cancer incidence in China, we must pay attention to and be alert to the lung cancer that may be caused by indoor radon as proposed internationally! The latest study of World Health Organization shows that the exposure to radon is proportional to the risk of lung cancer. On average, if the radon level in each cubic meter of space increases by 100 becquerels, the risk of lung cancer increases by 16%. Based on the average radon level in each region of the world, it is estimated that lung cancer cases caused by radon account for 3% to 14% of all lung cancer cases in each region. Therefore, when renovating, one should pay attention to the choice of decoration materials, use natural stone as little as possible to reduce the radiation source; secondly, pay attention to ventilation, don’t rush to move into the newly renovated house, ventilate more to exhaust the formed radon gas and wait for the environmental monitoring unit to pass the test before moving in with confidence. It is worth noting that humidifier and chemical agents can not get rid of radon gas.