CASTELLÓ. Bp and Iberdrola have just injected 900,000 euros into Castellón Green Hydrogen SL , the joint venture created for the development of the first green hydrogen project undertaken by both companies. Both companies signed the agreement last July that kicked off this project, a milestone that was staged in September with a public event at the facilities of the Serrallo industrial estate. With this capital increase, Castellón Green Hydrogen now has 1.2 million euros to take the first steps of this project.