ABSTRACT
With in excess of 220 definitions at the last count, it would be easy to assume that sustainability and sustainable development were arbitrary concepts. Nothing could be further from the truth. The supportive environment of planet Earth, which provides for our needs, present and future, works in definite ways circumscribed by the fixed rules of natural law. Stray outside of those rules and the global system suffers, decreasing its capacity to support all of life, including human wellbeing and economic activities.
