Batteries don't have the energy density to support hauling large masses of cargo over long distances [1]. Trains could be electrified, eliminating the requireme

Batteries don't have the energy density to support hauling large masses of cargo over long distances [1]. Trains could be electrified, eliminating the requirement to carry fuel at all, but that requires building new infrastructure which may not be as economic in low-density regions in North America. Hydrogen gas has the best energy density per unit of mass of any chemical fuel source (nuclear blows it out of the water, mind you), and could prove to be the best option for decarbonizing freight trains. 1, https://en.wikipedia.org/wiki/Energy_density#/media/File:Energy_density.svg https://en.wikipedia.org/wiki/Energy_density#/media/File:Ene...