As the human population increases, many decisions concerning our use of natural resources will determine our standard of living and the quality of our environment. This reader-friendly book helps readers develop an understanding of how geology interacts with major environmental problems facing society. Focuses on five fundamental concepts of environmental geology: Human Population Growth, Sustainability, Earth as a System, Hazardous Earth Processes, and Scientific Knowledge and Values. Features new chapters on Impacts of Extraterrestrial Objects and Waste as a Resource: Waste Management. Presents new or extensively revised discussion of human population growth, Alaska earthquake of 2002, emerging global water shortage, cleaning Boston Harbor, and much more. Revises many figures to more clearly illustrate the topics under discussion, based on user feedback. An informative reference for anyone interested in learning more about the environment.