One of the constant refrains we hear of industrial processes is the expression “hard to decarbonize,” most often referring to green steel manufacture and concrete. That expression seems to suggest that these two segments are unwilling to experiment with decarbonization when nothing is further from the truth. Rethink Energy has recently completed a report on Green steel and details many separate and sometime disparate attempts being made to decarbonize – some ideas focus on replacing coal and natural gas with hydrogen or other forms of heat, others on using more Direct Reduction of Iron using plasma furnaces, and other’s still on using more scrap metal. In a handful of cases, companies are entirely rethinking the way steel is made, to…