Oil and gas major BP Plc (<a href="https://www.londonstockexchange.com/stock/BP./bp-plc/company-page" target="_blank">LON:BP</a>) and Spanish utility 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>) on Thursday unveiled a 25-MW green hydrogen project, set at BP’s Castellon refinery in Spain’s Valencia region.