PM Sunrise at Bryce Canyon, Bryce Canyon, Utah. Courtesy Public Domain Photo

sustainable adjective1. Something capable of being sustained. 2. (a) Designating, of, or characterized by a practice that sustains a given condition, as economic growth or a human population, without destroying or depleting natural resources, polluting the environment, etc. sustainable agriculture. (b) governed or maintained by, or produced as a result of, such practices sustainable growth.