Earlier quoted context omitted.
This is the issue I have with people saying that solar power is "clean and eco friendly". It sure is, if you ignore the fact that you have to have a factory to make it where one of the *nicest* things around is the fucking hydrofluoric acid, and most of the rest will kill you instantly in trace amounts.
The technology is, the production is not but you can contain that, at least in theory. Compare that with gasoline that everytime you obtain energy from it you burn it out of existence and create a mess of the environment.
The propane is going to get burnt anyway. May as well extract some useful work from it, and when you run a car off it they become ultra low emission.