Sustainability

The notion of "sustainability" describes the characteristic property of a system to be self-preserved by maintaining the resources required for its performance. The term "sustainability" usually refers to either social, economic, constitutional or environmental systems.

 

http://en.wikipedia.org/wiki/Sustainability

http://www.hubbertpeak.com/bartlett/reflections.htm

http://alcor.concordia.ca/~raojw/crd/reference/reference001377.html