What is Sustainability?

Sustainability is using the resources we need for a good life, but leaving enough resources for future generations to have a good life too (to Paraphrase the Brundtland definition of sustainable development used in Rio Earth Summit 1992).

The Biosphere Eco-City (BEC) divides sustainability into 10 interrelated Themes of Sustainability (link) (i.e. Design, Habitat, Food, etc.) that are easy to understand and facilitate involvement and cooperation.