Spanish utility Naturgy Energy Group SA (<a href="https://www.bolsasymercados.es/bme-exchange/es/Mercados-y-Cotizaciones/Acciones/Mercado-Continuo/Ficha/Naturgy-Energy-Group-ES0116870314" target="_blank">BME:NTGY</a>) has started building a 300-MWp solar farm at a site in the region of Extremadura, western Spain, the company said on Friday.