In response to the overwhelming concern for possible acute and long-term effects of ozone depletion on terrestrial and aquatic life, this volume presents a comprehensive collection of review articles from an internationally acknowledged group of experts. Emphasis is on human health, with chapters on skin cancer, DNA, and vitamin D. Written for photobiologists, dermatologists, and biophysicists, this is the most thorough treatment of the subject available.

Unless action is taken, the developing world will face recurrent problems of food security and conflict. This volume provides a summary and perspective of the field of land resources and suggests improvements needed to conserve resources for future generations. Coverage provides an authoritative review of the resources of soils, water, climate, forests and pastures on which agriculture depends. It assesses the interactions between land resources and wider aspects of development, including population and poverty. It provides a strong critique of current methods of assessing land degradation...