Book excerpt: The new edition of this popular student text offers an engaging introduction to environmental study. It covers the entire breadth of the environmental sciences, providing concise, non-technical explanations of physical processes and systems and the effects of human activities. In this second edition the scientific background to major environmental issues is clearly explained. These include: * global warming * genetically modified foods * desertification * acid rain * deforestation * human population growth * depleting resources * nuclear power generation * descriptions of the 10 major biomes. Special student text features include illustrations and explanatory diagrams, boxed case studies, concepts and definitions.