摘要：To confirm air pollution caused by automotive exhaust gas, it is necessary to know its relation to traffic densities and amount of air pollutions. Measurements of carbon monoxide, sulfur dioxide, nitrogen oxides and dust particles contained in atmosphere were carried out at Kasumigaseki and Itabashi, heavy traffic area in Tokyo, from Jan. to Dec., 1964 to explain the correlation between traffic densities and air pollution in urban atmospheric pollution. Concentrations of carbon monoxide and sulfur dioxide has a high degree coefficient of correlation to traffic densities, especially the concentration of carbon monoxide marks out the pollution caused by automotive exhaust gas in the atmosphere. From the correlation of traffic densities and resulting pollutants, we can presume the degrees of air pollution in future caused by automotive exhaust gas. The correlation between traffic densities and amounts of nitrogen oxides in atmosphere is not so remarkable. The amount of dust particles was partially varied with the other factors, such as meteorological and geographical conditions.
