Iceland's unique geology allows it to produce renewable energy relatively cheaply, from a variety of sources. Iceland is located on the Mid-Atlantic Ridge, which makes it one of the most tectonically active places in the world. There are over 200 volcanoes located in Iceland and over 600 hot springs.[3] There are over 20 high-temperature steam fields that are at least 150 °C [300 °F]; many of them reach temperatures of 250 °C.[3] This is what allows Iceland to harness geothermal energy, and these steam fields are used for heating everything from houses to swimming pools.