本文只涉及接触正常浓度范围内空气污染物的生理影响,着重于在目前认为成为主要问题的一级和二级污染物。微粒一般城市居民接触微粒污染的水平为60～200微克/米~3,农村为10～20微克/米~3。城市越大似乎浓度水平越高。异常高的污染水平往往是由于当地的金属制造工业造成的。城市微粒直径大多数在0.4微米左右,大约有50%的微粒小于1.0微米。不同城市间的微粒大小比较一致。微粒从气体动力学的直径由0.5微米降至0.01微米时,肺内阻留率随之上升。控制产生大颗粒(50微米)的开放式燃煤对空气的污染和 This article deals only with the physiological effects of air pollutants exposed to normal concentrations, focusing on primary and secondary pollutants that are currently considered to be major problems. Microparticles The average level of exposure to particulate pollution in urban areas is 60-200 μg / m3, while in rural areas it is 10-20 μg / m3. The larger the city it seems, the higher the concentration level. Abnormally high levels of pollution are often caused by the local metal manufacturing industry. Most city particles are about 0.4 microns in diameter, and about 50% are less than 1.0 microns. Different cities between the particle size is more consistent. When the particle diameter decreases from 0.5 μm to 0.01 μm in aerodynamic diameter, the rate of lung retention increases. Control of air pollution caused by open coal combustion with large particles (50 microns)