1 FRONT MATTER; 2 SUMMARY; 3 PART I: CHEMISTRY AND PHYSICS OF OZONE REDUCTION; 4 1 CURRENT STATUS; 5 PART II: BIOLOGICAL EFFECTS OF INCREASED SOLAR ULTRAVIOLET RADIATION; 6 2 INTRODUCTION; 7 3 MOLECULAR AND CELLULAR STUDIES; 8 4 ECOSYSTEMS AND THEIR COMPONENTS; 9 5 DIRECT HUMAN HEALTH HAZARDS; 10 REFERENCES; 11 GLOSSARY; 12 LIST OF CHEMICAL SYMBOLS; 13 APPENDIXES; 14 A PERTURBATIONS OF THE STRATOSPHERE AND OZONE DEPLETION; 15 B STRATOSPHERIC PERTURBATIONS--THE ROLE OF DYNAMICS, TRANSPORT, AND CLIMATE; 16 C RECENT DEVELOPMENTS IN STRATOSPHERIC PHOTOCHEMISTRY; 17 D THE MEASUREMENT OF TRACE REACTIVE SPECIES IN THE STRATOSPHERE: A REVIEW OF RECENT RESULTS; 18 E TREND ANALYSIS OF TOTAL OZONE; 19 F DETECTION OF TRENDS IN THE VERTICAL DISTRIBUTION OF OZONE; 20 G THE ASSOCIATION OF DNA DAMAGE WITH CANCER-INITIATING EVENTS; 21 H PARTICIPANTS IN THE WORKSHOP ON BIOLOGICAL EFFECTS OF INCREASED SOLAR ULTRAVIOLET RADIATION; 22 I BIOGRAPHICAL SKETCHES OF COMMITTEE MEMBERS AND CONSULTANTS