Abstract
The writer's examination on the so-called human effects by the atmospheric photochmical smog in the Kanto plain, during the period of 1972-75 brought the following interpretations.
1) The human effects by the atmospheric photochemical smog were reported all over the Kanto plain
2) Their distribution is concordant with the population density.
3) Precisely speaking, it is less densely distributed at the center than at the surroundings.
4) The above may be explained by the areal differences in population density, the people's mentalities to claim to their communal governments, etc.
5) Linear distributions in the central Tokyo metropolitan area are concordant with the traffic lines and may be resulted from the pollutant emitted by motor vehicles.
6) The NW-SE linear distributions in Southwestern Saitama Prefecture may be also resulted from the emission by motor vehicle.
7) The symptoms are heavier in the central and western part.
8) And they reduce to the surroundings in general, with a few exceptions and there are some areal differences in the reduction types.
9) There are regional differences in occurring time of the human effects by the atmospheric photochmical smog, i. e. earlier at 7-8 in the morning in the western, central and eastern parts and later at 17:30 in the northern and southern parts.
