1. Introduction -- 2. World electricity demand and source mix forecasts -- 3. Worldwide potential of low-enthalpy geothermal resources -- 4. Low-enthalpy resources as solution for power generation and global warming mitigation -- 5. Geological, geochemical and geophysical characteristics of geothermal fields -- 6. Geochemical methods for geothermal exploration -- 7. Geophysical methods for geothermal resources exploration -- 8. Power generation techniques -- 9. Economics of power plants using low-enthalpy resources -- 10. Small low-enthalpy geothermal projects for rural electrification.