There are constant reports that men’s sperm have been declining in quantity and quality for half a century. Is men’s body so fragile? At present, the most common harmful substances in indoor decoration mainly include formaldehyde, radon gas, benzene, xylene, ammonia, benzopyrene and radioactive materials. These pollutants mainly come from building and decorative materials: free formaldehyde in decorative materials (a variety of man-made boards and furniture); benzene in paints, coatings and adhesives; asbestos and other hazardous substances contained in fireproofing or acoustic insulation materials; the radioactivity contained in natural stone; some building materials (such as floor tiles) in the production and processing of some of the intermingled with the radioactive industrial residue, and so on. In addition, due to the use of uranium-containing granite and other substandard stone, indoor natural gas combustion ventilation is not good, resulting in indoor lung cancer-causing radioactive gas radon exceeds the standard phenomenon can not be ignored. This situation is particularly prevalent in newly renovated homes. Breathing polluted air for a long time will lead to cancer, leukemia, respiratory tract lesions, etc. Due to the special physiological qualities of pregnant women and infants, the likelihood of contracting these lesions is much greater than that of the general population. The more time a woman spends in pollutant-laden air during pregnancy, the greater the likelihood that the child she gives birth to will suffer from a serious congenital disease, especially during the first trimester of pregnancy when the fetus will be more affected by the external environment. Benzene pollution caused by paints, coatings and adhesives used in decoration is more harmful to women than men. If you are exposed to toluene, xylene and benzene mixtures during pregnancy, the incidence of pregnancy complications such as hypertensive syndrome of pregnancy, vomiting in pregnancy and anemia in pregnancy increases significantly, and the rate of spontaneous abortion increases significantly. Benzene may also cause congenital defects in the fetus. Women who inhaled large amounts of toluene throughout their pregnancies gave birth to babies with microcephaly, central nervous system dysfunction and growth retardation. Formaldehyde is a colorless gas with a strong irritating odor. Mainly from man-made panels, adhesives and paints, etc., it can directly trigger respiratory discomfort, can cause liver and lung function damage, was identified by the World Health Organization as a suspected carcinogen, the national standard, indoor per cubic meter can not exceed 0.08 milligrams. Formaldehyde can cause menstrual disorders and abnormalities in women. Free formaldehyde in artificial boards and furniture is not only a suspected carcinogen, but also may cause women’s menstrual disorders and menstrual abnormalities, mainly manifested as irregular menstruation, dysmenorrhea and menstrual decrease. Some newlyweds unexplained prolonged infertility, some pregnant women in normal pregnancy found fetal malformation, these phenomena are often with this pollution has a certain relationship. The benzene series includes benzene, toluene and xylene. It exists in large quantities in paints, waterproof coatings, latex paints, has an aromatic odor, inhalation of the human body will cause drowsiness, headache, vomiting, etc., and is recognized by the World Health Organization as a toxic carcinogen. Long-term inhalation of benzene by pregnant women can lead to abnormal fetal development and miscarriage. Radiation includes X-rays, gamma rays and fast neutrons. These rays act directly or indirectly on the cells and can cause DNA damage, which leads to cell degeneration and even death. Therefore, this principle of rays is often used in medicine to carry out radiation therapy for tumor patients. As we know, testis is an important place for sperm production, and the environment in which testis is located has a great influence on the spermatogenic function of human body. As early as in the beginning of this century, scientists found that radiation can damage the spermatogenic function of human testes, and radioactive radiation can lead to spermatogenic disorders and chromosomal aberrations, resulting in male infertility and fetal malformation. Today, a large number of studies have also confirmed that radioactive radiation can directly cause reduced fertility, and even lead to permanent sterility. Indoor ammonia originates primarily in concrete antifreeze, but can also come from upholstery and wood paneling. Ammonia is highly irritating to the respiratory tract and damaging to the mucous membrane of the eyes and the skin. It can cause tears, sore throat, coughing up phlegm, and in severe cases, lead to respiratory distress and coma. What is radon? Is it really that harmful to people’s health and fertility? Radon is indeed quite unfamiliar to many people. It is a kind of natural radioactive gas, colorless, odorless and tasteless, and people often become victims and are still at a loss. It is a gas produced by radioactive substances such as uranium in the process of decay, including radon and radon daughters. Radon is easy to diffuse, soluble in water, highly soluble in fat, and can easily enter the human body. If it enters the bronchial tubes and lungs through breathing, radon daughters can cause continuous radioactive irradiation to the lung tissues, causing damage to the genetic material in the cells and eventually causing lung cancer. In addition, it can also cause leukemia, abnormal spermatozoa in men, drop in sperm count, and so on. Radon is widely found in granite slabs, concrete or cinder blocks containing uranium, thorium and other elements, etc. Excessive radon levels in urban households are mostly related to the use of substandard materials in building or renovating houses. As far as our country is concerned, Guangdong Province belongs to a high radon area. According to the results of a survey conducted by the relevant departments, about 1/3 of the 200 samples were found to have exceeded the standard, which is surprising. The World Health Organization has pointed out in a report that 10% to 20% of lung cancer patients in western countries are sickened by radon. In the United States, about 3,000 to 20,000 people die every year due to injuries caused by the radioactivity of radon. How should people guard against the harm of radon? 1. No matter whether you are building a house or renovating it, the building materials used must comply with the standards set by the state and you must not be careless. 2. After the house is installed, the windows must be opened to ventilate, so that the undesirable gases can be volatilized as far as possible, and it is not possible to move to the house in a hurry. Daily life should also pay attention to more open windows, even if the use of air conditioning in the summer, winter use of heating, do not forget to do a good job of replacing indoor air conditioning on a regular basis. Every day to arrange time to outdoor activities or walk. 3. At present, China has developed radon emulsion paint with various functions such as anti-radon, anti-mold and anti-bacteria, and the effective rate of anti-radon can reach 80%, which is a good helper for people to prevent radon at home.