In the various regions which used to suffer from air pollution in Japan, the redevelopment and rehabilitation of the environment and community renovation activities have been promoted to regain health and communities worthy to live in so that we will have no more pollution in the future. In doing so, we utilize the lessons learned from the experience of pollution. This page is an introduction page for the redevelopment and rehabilitation of the environment and community renovation activities performed in various regions. We also provide information so that people in Japan and in the rest of the world can refer to our experience.