The 111th meeting for research of safety engineering was held on 27th July, 1992. The topic presented by Igawa of Kanagawa university has been movement and effect of acid materials in the environmental atmosphere. Further, Hyomi of Japan environmental health center has made presentation on the present condition of environmental pollution in Japan and East Asian countries, mainly emphasizing to atmospheric pollution. According to former presentation, the main acid materials contained in the pollutants released in the atmosphere are sulfur oxides and nitrogen oxides. The fallout of acid materials are represented by acid rain and acid fog, and they have environmental effects such as; direct effect to human body, destruction of forest, acidification of lakes and marshes, and pollution of outdoor sculptures and construction materials. It is cited that the termination of the source for pollution is necessary to solve the pollution problems. As for the later topic, the presentation is made on the results of direct investigation of atmospheric pollution problems faced by Taiwan, Thailand and China since 1980`s. 1 fig., 1 tab.