>>2007419Diesel-electric is really the best portable energy for trains and ships. Natural gas becomes a headache to safely move without using a pipeline, especially with the volumes needed on that kind of power generation. Obviously caternary is the best power-on-demand system for transportation (and nuclear best for electrical supply), but short of huge infrastructure overhauls, either diesel or kerosene generators are the best portable option. Direct-drive gas and diesel make more sense on smaller vehicles like trucks, cars, or small boats, however. As you seem to be aware, all-battery vehicles are fucking stupid for anything more than a personal car.