A pending new regulation from the Treasury Department could have unintended consequences on a promising new hydrogen industry's growth. : Hydrogen storage tanks, an electricity substation and electrolyzer during the final stages of ... [+] construction at Iberdola SA's Puertollano green hydrogen plant in Puertollano, Spain, on Thursday, May 19, 2022. The new plant will be Europe's largest production site for green hydrogen for industrial use.