Salzgitter Flachstahl GmbH, a subsidiary of German steel producer Salzgitter AG (<a href="https://www.boerse-frankfurt.de/equity/salzgitter-ag" target="_blank">ETR:SZG</a>), has agreed to source even more renewable energy from the local unit of Spain’s Iberdrola SA (<a href="https://www.bolsasymercados.es/bme-exchange/es/Mercados-y-Cotizaciones/Acciones/Mercado-Continuo/Ficha/Iberdrola-ES0144580Y14" target="_blank">BME:IBE</a>).