Wikipedia
An eco-municipality or eco-town is a local government area that has adopted ecological and social justice values in its charter. The development of eco-municipalities stems from changing systems in Sweden, where more than seventy municipal governments have accepted varying principles of sustainability in their operations as well as community-wide decision making processes. The purpose of these policies is to increase the overall sustainability of the community.
The distinction between an eco-municipality and other sustainable development projects (such as green building and alternative energy) is the focus on community involvement and social transformation in a public agency as well as the use of a holistic systems approach. An eco-municipality is one that recognizes that issues of sustainability are key to all decisions made by government.