The ability to maintain something over the long term. A sustainable community is one that can afford to keep up the costs of running the community over the long term, can ensure that the environment is protected for future generations, and can make people feel like they are included in the community's social life. The best way to create a sustainable community is to develop plans and solutions that deal with all three of those parts—economic, environmental, and social—together. More information via the Institute for Sustainable Communities.