Photochemical smog

It was high summer at the Northen Kyushu on May 27. City announced photochemical smog warning and 85 elementary schools canceled field day. 362 people (Pupils and teachers) complained about ache of eyes and throat. For the first time field day was canceled by photochemical smog at the Northen Kyushu. Photochemical smog warning was announced, when harmful substance,photochemical oxidant, in the air exceed standard consistency(0.12ppm).