In an ideal world, we’d swap out every diesel truck, emergency generator, and heater with something cleaner. Even better, we’d do it all by tomorrow at noon. If we could do that, and also build out the needed infrastructure for alternatives (charging stations, battery storage, etc.) by about 1 or 2 o’clock, we wouldn’t have to worry about diesel anymore. Refiners could quit making the stuff, and people could quit burning it for energy.