Focused on current environmental problems, their causes, effects, and solutions, this text explores the basic nature of the natural systems. Using a technical (quantitative) approach; unusual for a book at the introductory level, it maintains a broad perspective that appeals to all students, but at the same time is useful to those proceeding further in environmental or sanitary engineering. Table of Contents I. CAUSES OF ENVIRONMENTAL PROBLEMS. 1. The Nature and Scope of Environmental Problems. 2. Population and Economic Growth. 3. Energy Growth. 4. Natural Environmental Hazards. 5. Human Environmental Disturbances. II. SCIENTIFIC BACKGROUND. 6. Physics and Chemistry. 7. Atmospheric Sciences. 8. Microbiology and Epidemiology. 9. Ecology. III. TECHNOLOGY AND CONTROL. 10. Water Resources. 11. Water Supply. 12. Water Pollution. 13. Air Pollution. 14. Solid Wastes. 15. Hazardous Wastes. 16. Environmental Management. Appendix A. Symbols, Dimensions, and Units. Appendix B. Physical Properties and Constants. Appendix C. Abbreviations and Symbols. Appendix D. Special Environmental Problems. Index.