What is sustainability?
It is meeting the needs of the present without compromising the ability of future generations to meet their own needs. -United Nations World Commission of Development and Environment
4 System Conditions of a Sustainable Society
In a sustainable society, nature is not subject to systematically increasing...
1. Concentrations of substances extracted from the Earth’s crust
2. Concentrations of substances produced by society,
3. Degradation by physical means
and, in that society...
4. People are not subject to conditions that systematically undermine their capacity to meet their needs.