> The energy density of plastic (by weight, not volume) is virtually identical to that of oil. Oil-based unleaded fuel is not oil. You probably could run train

> The energy density of plastic (by weight, not volume) is virtually identical to that of oil. Oil-based unleaded fuel is not oil. You probably could run trains on plastic. That's if you didn't mind hot plastic raining down around the tracks as the coal dust and soot did when we used it for trains.