EntityQ68139· pop 31· linked from 200 articlesBiosphere 2Sign in to saveartificial closed ecological systemConnectionsUniversity of ArizonaEntityArizonaEntityclimate changeEntityrestoration ecologyEntityNorthern ArizonaEntityAmericasEntityFloridaEntityoceanEntityJohn F. KennedyPersonYouTubeConceptoxygenEntityagricultureEntityNew MexicoEntitydesertEntityPhoenixEntitygeographic coordinate systemEntityphotosynthesisEntityInternational Standard Book NumberEntityouter spaceEntityVertebrataEntityCategories1991 establishments in ArizonaAgricultural buildings and structures in ArizonaArtificial ecosystemsBiosphereBuildings and structures in Pinal County, ArizonaColumbia UniversityControlled ecological life support systemsEcological experimentsGreenhouses in the United StatesHuman analog missionsSanta Catalina MountainsSpace farming