For years, green hydrogen has been touted as a kind of silver bullet for decarbonization. Hydrogen can be combusted at high temperatures, making it a potential solution for cleaning up some of the dirtiest industrial sectors on earth, with the ability to replace thermal coal in steelmaking and heavy fuel oil in industrial shipping. But instead of releasing greenhouse gases when burned, hydrogen leaves behind nothing but water vapor. Green hydrogen has therefore been a subject of major buzz in the public and private sectors alike for its ability…