Is geothermal hvac a more efficient option? Has it been used in large buildings? https://www.nationalgeographic.com/environment/great-energy-challenge/2013/10

Is geothermal hvac a more efficient option? Has it been used in large buildings? https://www.nationalgeographic.com/environment/great-energy-challenge/2013/10-myths-about-geothermal-heating-and-cooling/ https://www.nationalgeographic.com/environment/great-energy-...