GEOTHERMAL ENERGY AND A RENEWABLE, RENEWABLE RESOURCE FOR THE PRODUCTION OF ELECTRICITY AND HEAT IN MANY APPLICATIONS. OVER THE PAST 20 YEARS, THE ITALIAN GEOTHERMAL PRODUCTION, WHICH IS, MOREOVER, CONCENTRATED IN TUSCANY, AND HAS REMAINED STABLE TODAY BY ABOUT 1.64 % OF THE NATIONAL ELECTRICITY DEMAND AND ABOUT 26 % OF TUSCANY. THE ITALIAN GEOTHERMAL POTENTIAL, WHICH IS INDUSTRIALLY AND COMMERCIALLY VIABLE, AND ESTIMATED BY THE GEOTHERMAL NETWORK (GROUPING OF ITALIAN GEOTHERMAL ENERGY COMPANIES) IN ABOUT 2 500 MW, WHICH, TOGETHER WITH THAT ALREADY USED TODAY, WOULD MAKE IT POSSIBLE TO PRODUCE ABOUT 10-12 % OF THE NATIONAL ELECTRICITY DEMAND, WITH EMPLOYMENT AND ECONOMIC BENEFITS OF EUR 8-10 BILLION OVER THE NEXT 20 YEARS. THE DEVELOPMENT OF PROJECTS IN THIS AREA COVERS BOTH PRODUCTION AND THE RELEASE OF GEOTHERMAL FLUIDS PRESENT IN THE FRACTURED RESERVOIR WHICH IS DEEPER BETWEEN 3 KM AND 5 KM. WHAT TECHNOLOGIES ARE USED FOR?