In the process of economic growth, pollution has occurred in many cities. In these cities, many peoples suffered from health damage. In addition, the bad reputation of cities that have been recognized as polluted lingers even after the pollution issues have been resolved. In this session, we have invited a speaker from Pittsburgh, USA, which had an air pollution problem and succeeded in revitalizing itself after the resolution of the pollution problems. We will also discuss what we can do to revitalize polluted cities with the mayor of Minamata.