Indoor air pollution has become the cause of a variety of diseases, is a killer of human health hazards". The first type of virus infection of respiratory tract damage, as many as 200 kinds, including influenza virus, measles virus, rubella virus, coronavirus.
In recent years at home and abroad of indoor environmental pollution has been studied, toxic and harmful substances have been detected up to hundreds of physical category are:
electromagnetic wave, noise and radiation; biological category are: bacteria, fungi, viruses, parasites, pollen and so on; chemistry class: two of sulfur dioxide and formaldehyde etc.. These harmful substances can be harmful to human health.
China Standardization Association survey shows that 68% of the disease is caused by indoor pollution! Experts found that the United States detection, there are 500 different kinds of volatile organic compounds in indoor air, of which there are more than 20 kinds of carcinogenic substances, more than 200 kinds of pathogenic viruses, harmful mainly are: radon, formaldehyde, ammonia, benzene and trichloroethylene ester, etc.. Indoor air pollution than outdoor serious 2-5 times, and sometimes can reach 100 times. The United States and other developed countries have put indoor air pollution in 5 major environmental factors that harm human health.
One of the important reasons for residents in some indoor activities is caused by air pollution, such as cooking fumes, combustion exhaust gas, natural gas, smoke cigarette smoke and even body discharged by metabolic waste and so on, can become a serious source of pollution. Spray ejected it when people talk, but also an important way to the spread of bacteria and viruses and other microorganisms. In addition, the coal based energy structure and a large number of decentralized life energy consumption is also one of the main causes of indoor air pollution.
consulting