sustainability, Long-term viability of a community, set of social institutions, or societal practice. In general, sustainability is understood as a form of intergenerational ethics in which the environmental and economic actions taken by people in the present day do not diminish the opportunities of people in the future to enjoy similar levels of wealth, utility, or welfare. It rose to prominence with the modern environmental movement, which rebuked the unsustainable character of contemporary societies where resource-use, growth, and consumption patterns threatened the integrity of ecosystems and the well-being of future generations. Sustainability is presented as an alternative to short-term, myopic, and wasteful behaviours. It can serve as a standard against which existing institutions are to be judged and as an objective toward which society should move.