Contiene: Vol I: Preface -- Executive summary -- Frequently asked questions about ozone -- Part 1: Halocarbon, ozone and temperature changes: Chapter 1: Long- lived ozone-related compounds, by Ronald G. Prinn and Rodolphe Zander; Chapter 2: Short-lived ozone-related compounds, by Michael J. Kurylo y José M. Rodríguez; Chapter 3: Global distributions and changes in stratospheric particles, by Sophie Godin y Lamont Poole; Chapter 4: Ozone variability and trends, byRumen D. Bojkov y Robert D. Hudson; Chapter 5: Trends in stratospheric tempertatures, Marie-Lise Chanin y V. Ramaswamy -- Part 2: Advances in understanding the processes involved: Chapter 6: Upper stratospheric processes, Rolf Müller y Ross J. Salawitch; Chapter 7: Lower stratospheric processes,by A. R. Ravishankara y Ted Shepherd; Chapter 8: Tropospheric ozone and related processes, by Jos Lelieveld y Anne M. Thompson -- Part 3: Impacts of ozone changes: Chapter 9: Ultraviolet radiation at the earths surface, by Jay Herman and Richard McKenzie; Chapter 10: Climate effects of ozone and halocarbon changes, by Claire Granier and Keith P. Shine -- Part 4: predictions of future changes: Chapter 11: Halocarbon scenarios for the future ozone layer and related consequences; Chapter 12: Predicting future ozone changes and detecgion of recovery, by David J. Hofmann and John A. Pyle