The Prime Minister of Portugal, António Costa, accompanied by the Chairman of Iberdrola, Ignacio Sánchez Galán, inaugurated on Monday the Tamega hydroelectric giga battery (Portugal), the largest project of its kind in Europe, with an investment of more than 1,500 million euros. The Alto Tamega hydroelectric complex is made up of three dams and, thanks to its reservoirs and, thanks to its reversible pumping capacity, it is capable of storing…