Even better - miniaturize this process and as your mower cuts the grass, it goes into the hopper and is processed back into fuel for the engine and fertilizer for the yard!
Before anyone explains economies of scale to me, I'm joking here
You are joking, but I am not. Even a break even process for converting organic waste into something other than landfill would be a wonder.
I realize you are joking here, but I
would be interested in how small they could make this process and still have it pay off. If you could set up a reasonably small facility, it could even be solar powered, as heat is something that can be harvested rather well. Anyone who has ever sat in a car that was parked outside of the shade in texas during the summer can readily attest to this :-)
I think it would be pretty cool (so to speak) to be able to feed a (relatively) biomass of some kind (leaves, lawn clippings etc) and have it, by using a solar concentrator, produce oil for you. Granted, here in texas, we don't have much use for heating oil, but I'm sure you could use it to run a generator of some kind. I'd gladly take the yard-based waste from my neighborhood and turn it into a readily salable and transportable petrolium product.
hopefully small enough to power the flux capacitor in your DeLorean.