Turkey is one of the 7 geothermal-potential rich countries in the world. More than 1,000 hot and mineral water springs (up to 373 and 413 K) in geothermal fields with a temperature range of 313 to 505 K have been discovered in Turkey. Geothermal energy is clean, inexpensive, renewable, and can be utilized in various forms, such as space heating and domestic hot water supply, CO2 and dry-ice production processes, heat pumps, greenhouse heating, swimming and balneology (therapeutic baths), industrial processes, and electricity generation. Since 1990, space heating and greenhouse developments have exhibited significant progress. The overall geothermal potential of Turkey is about 38,000 MW.