Geothermal Power Production, Larderello, Italy Stock Photo

Larderello, a frazione of the comune of Pomarance in Italian Tuscany, is a volcanically active area, renowned for its geothermal productivity. Larderello now produces 10% of the world's entire supply of geothermal electricity, amounting to 4,800 GWh per year and powering about a million Italian households. Its geology makes it uniquely conducive to geothermal power production, with hot granite rocks lying unusually close to the surface, producing steam as hot as 220 °C (396 °F).