Part 1. Water and wastewater treatment: Biofilms and environmental protection, H.-C. Flemming; Turbidity related to surface temperature in oxidation ponds - studies toward development of a remote sensing method, I. Dor et al; Combined aerated ponds and chemical clarification in the treatment of petrochemical wastewater, N. Galil, M. Rebhun; Activated carbon for air purification in New York City's sewage treatment plants, A. Turk et al. Part 2 Groundwater contamination: Proposed California regulations for groundwater recharge with reclaimed municipal wastewater, T. Asano; Using air-lift pumping as an in situ aquifer remediation technique, H. Gvirtzman, S.M. Gorelick. Part 3 Air pollution: Chemical and physical properties of emissions from Kuwaiti oil fires, R. Stevens et al; ESR indication of heavy metal contamination of urban atmosphere, B. Iosefzon-Kutavskaya et al. Part 4 Environmental Health: Carcinogenesis risk assessment model for environmental chemicals, J.S. Helfand, K.H. Mancy; Viruses and shellfish, L. Schwartzbrod, S. Boher; Respiratory problems among schoolchildren living in the vicinity of an industrialized zone, A. Goren et al. Part 5 Aquatic ecosystems: Long-term programme for pollution monitoring and research in the Mediterranean (MED POL), L. Jeftic; Assessment of turbulent processes in Lake Kinneret by the two-dimensional reservoir water quality model "BETTER", Y. Oziransky, B. Shteinman; Distribution of trace elements in the filterable and acid extractable fractions of waters of the northern Jordan river, A. Sandler et al; Chemical aspects of coal fly ash disposal at sea - predicting and monitoring environmental impact, N. Kress. Part 6 Terrestrial and general ecology: Measures of ecosystem health and integrity, S. Amir, J. Hyman; Vegetative propagation of species of genus Allium L., R. Kamenetsky; Rodent populations recovering from fire in an East-Mediterranean woodland, I. Izhaki et al.