Uncle Les drove a Ford pickup truck that he fueled with propane, and a '56 Crown Victoria also with a gas tank in the trunk. It was cheaper than gasoline and ran much cleaner. One of the tractors ran on propane also, so he had a large gas tank. This was 1957 and Texas was mostly concerned with choking off oil production in attempt to keep prices over a dollar forty a barrel. Gas was about twenty cents a gallon, and two guys would come out of the station, check your oil and tires and pump your gas. Green stamps were given. Nobody had heard of self service.
The point of this rambling bit of typing is to point out that there are other fuels that can get us around town and to soccer practice that don't require massive investments in counterproductive bio fuels. The central states of the US are floating on a sea of natural gas (methane) that can be converted to butane without a lot of bother. It would be a stopgap on the road to an electric car fleet, but it is doable. Fueling with propane is trickier than with gasoline, and would take some educating drivers or even a return to gas station attendants. It's a blast from the past that deserves a second look.