First, the pollution of decoration remains, decoration pollution in China is considered a very serious type of pollution, the main pollutants it produces are called volatile organic compounds. We are familiar with the indoor air pollution harmful gases formaldehyde, benzene, toluene and xylene, etc.
Second, particulate matter pollution, particulate matter is not to say that it will only be generated in the haze weather, it will also exist in normal weather, the harm to the human body is relatively large compared with other pollutants. In addition, during the breathing process, particles 5 microns or more in diameter can enter the trachea and bronchi, but particles smaller than 5 microns, especially 1 to 3 microns, will enter the alveoli, and the alveoli undergo gas exchange. It is engulfed by macrophages and stays forever in the alveoli or dissolves in the blood and reaches the rest of the body as it circulates. When the pollution is light, first of all, it affects the susceptible population, ie children, the elderly, respiratory diseases and cardiovascular disease patients. As the haze increases, the pollution also increases, and then affects the entire population.
Third, odor, odor formation of many factors, including tobacco, alcohol, food and garbage odor caused by corruption and toilet smell.