城市大气颗粒物的毒性及其对呼吸道疾病发病率和死亡率的影响,文献已有报道。伦敦1952和1962年两次烟雾事件中飘尘和二氧化硫浓度的比较分析证实,死亡人数增加的主要原因是飘尘浓度过高,二氧化硫的作用是第二位的。毒理实验也证 The toxicity of urban atmospheric particulate matter and its impact on the incidence and mortality of respiratory diseases, the literature has been reported. A comparative analysis of the concentrations of fly ash and sulfur dioxide in two smog episodes of London in 1952 and 1962 confirmed that the main cause of the increase in death tolls was the high concentration of fly ash and the second highest contribution of sulfur dioxide. Toxicology experiments are also evidence