Taking a global perspective, this book provides a concise overview of drylands, including their physical, biological, temporal, and human components. Examines the physical systems occurring in desert environments, including climate, hydrology, past and present lakes, weathering, hillslopes, geomorphic surfaces, water as a geomorphic agent, and aeolian processes Offers an accessible introduction to the physical, biological, temporal, and human components of drylands Investigates the nature, environmental requirements, and essential geomorphic roles of plants and animals in this stressful biological environment Highlights the impact of human population growth on climate, desertification, water resources, and dust storm activity Includes an examination of surface/atmosphere interactions and the impact of ENSO events.