Now I don't mean illegal stills popping up everywhere with people drinking the alcohol! - I mean If everyone fed their vegetable waste through a shredder - then into a fermentation tank with enzymes and a high yield yeast, then just take out tank in a few weeks and connect into your car. You could then pump it through a very small heater unit - that will boil off the alcohol vapour in a continuous process using engine coolant at 90 degrees centrigrade. The resultant vapour would feed into the air inlet manifold - reducing the overall fuel load.
At the end of the trip, the tank could be taken back inside the house - still giving off heat untill cool - thus conserving more energy in the home - a giant hot watter bottle.
When cool, could be emptied onto a compost heap - with all the plant sugars effectively used.
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