Systems that provide for the maintenance of life in an isolated living chamber through reutilization of the material available, in particular, by means of a cycle wherein exhaled carbon dioxide, urine, and other waste matter are converted chemically or by photosynthesis into oxygen, water, and food. (NASA Thesaurus, 1988)

Synonyms: System, Closed Ecological, Ecological Systems, Closed, Ecological System, Closed, Sealed Cabin Ecologies, Closed Ecological System, Cabin Ecology, Sealed, Cabin Ecologies, Sealed, Breadboard Project, Ecology, Sealed Cabin, Closed Ecological Systems, Ecologies, Sealed Cabin, Project, Breadboard, Sealed Cabin Ecology, Closed Ecologic Life Support Systems, CELSS, Systems, Closed Ecological, Life Support Systems, Regenerative, Breadboard Projects, Projects, Breadboard