THE FIRST GEOTHERMAL ELECTRICITY GENERATING PLANT WAS BUILT IN 1911 AT LARDERELLO, TUSCANY, ITALY. THIS PLANT BUILT UPON A VERY LONG HISTORY OF USE OF GEOTHERMAL RESOURCES ON THE ITALIAN PENINSULA, GOING BACK TO ROMAN USE OF HOT SPRINGS FOR BATHS, AND DOMESTIC HEATING.
Cold water is pumped down to super hot granite rocks located close to the surface. High pressure 200+ degree celcius steam is returned which turns turbines and generates electricity. Currently around one million homes are powered by geothermal electricity from Landerello - almost 5,000 GWh per year, or 10% of the world's total geothermal electricity production.
Below is one of the most modern geothermal plants in the world... at Nesjavelir, Iceland
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