This book demonstrates how geothermal energy can be a driving force for an economically sound and sustainable development of developing countries. It looks at the provision of geothermal energy within the framework of sustainable energy development in the developing countries for power generation, rural electrification and direct use to support small-scale industries, like food processing, greenhouse cultivation, pisciculture etc. The book gives an overview of the geothermal resources available around the world and their possible uses as function of temperature and economical availability, suitable geothermal exploration techniques, and optimal geothermal exploitation methods.