Iron can be refined electrolytically without coal: https://phys.org/news/2013-05-electrolysis-method-green-iron.html https://phys.org/news/2013-05-electrolysis

Iron can be refined electrolytically without coal: https://phys.org/news/2013-05-electrolysis-method-green-iron.html https://phys.org/news/2013-05-electrolysis-method-green-iron... This is not cost effective compared to the standard method, and only small scale prototypes exist.