ICETT Let's learn about Yokkaichi Pollution Outline of Japan's Industrial Pollution Abatement Approaches to Air Pollution Control (Case Study-1) Yokkaichi City, Mie prefecture (3) Regulation by Air Pollution Control Law (1968) Figure 2 - 4 Figure 2 - 4 Figure 2-4 Changes in Sulfur Dioxide Concentration Associated with the Use of Tall Smokestacks