Reuters: Lajos Barath last year took an ancient route to energy for his hospital. Switching the heating and hot water entirely to geothermal energy, he was building on a Roman discovery continued by the Turks. Besides saving energy costs, the two wells 2,150 meters (7,000 feet) deep from which hot water is pumped proved a good investment last month, when Russia cut off gas supplies through Ukraine in freezing midwinter. “We set up an energy system in our hospital … which is based on a …