Section heading and selected papers: Preface. Higher Plant Growth Under Controlled Environmental Conditions. Current and potential productivity of wheat for a controlled environment life support system, B G Bugbee & F B Salis;ury. Utilization of sweet potatoes in controlled ecological life support systems (CELSS), W A Hill et al . Transpiration during life cycle in controlled wheat growth, T Volk & J D Rumme;. Long-term experiments on man's stay in biological life support systems, I I Gitelson et al . Waste Oxidation. Waste recycling issues in bioregenerative life support, R D MacElroy & D Wang. S;bcritical and supercritical water oxidation of CELSS model wastes, Y Takahashi et al . Effect of iodine disinfection products on higher plants, D Janik et al . Carbon Cycling. Productivity and food value of Amaranthus cruentus under non-lethal salt stress, B A Macler & R D MacEl;oy. Carbon cycling by cellulose-fermenting nitrogen-fixing bacteria, S B Leschine & E Canale-;arola. Biofermentor Design and Operation. Design for a bioreactor with sunlight supply and operations systems for use in the space environment, K Mori et al . Closed and continuous algae cultivation system for food production and gas exchange in CELSS, M Oguchi et al . Phase separated membrane bioreactor: results from model system studies, G R Petersen et al . Author Index.