
Closed ecological systems (CES) are ecosystems that do not rely on matter exchange with any part outside the system. The term is most often used to describe small manmade ecosystems. Such systems are scientifically interesting and can potentially serve as a life support system during space flights, in space stations or space habitats. In a closed ...
Found on
http://en.wikipedia.org/wiki/Closed_ecological_system

A system that provides for the maintenance of life in an isolated living chamber, such as a spacecraft cabin, by means of a cycle wherein carbon dioxide, urine, and other waste materials are converted chemically or by photosynthesis into oxygen, water, and food.
Found on
http://www.daviddarling.info/encyclopedia/C/closedecol.html
No exact match found.