Maybe improving rail emissions should be a very low priority, because: * It's already the most CO2 efficient way to move freight. * It's also one of the thing

Maybe improving rail emissions should be a very low priority, because: * It's already the most CO2 efficient way to move freight. * It's also one of the things that's going to be hardest to improve. Little steps like considered here: battery-electric locomotives for use in rail yards-- make a lot of sense. There may be some specific rail lines that lend themselves to overhead electrification. And otherwise, maybe the focus should be on moving more goods transport to rail instead of making rail more CO2 efficient.