Asthma incidence over the time of the former Yokkaichi 1998.10.15

Katsumi Yoshida, professor Emeritus Mie Univ., was examining about 5400 elementary school children in the city of China and Honxi, where iron and steel is not sparing, and it is clear that the rate of asthma symptoms is about 9% in the sixth grade of the central part of the city and about 11% of women. When investigating the 1000 elementary school students in Yokkaichi to 82 people in the Japan, the sulfur dioxide concentration in the 1995 fiscal Year of Hon Xi is 0. At 051PPM, it is twice as serious as the pollution in Yokkaichi.