Maybe this would make a good backup energy system

[Peterae]

Now i think everyone has access to grass cuttings, sawdust, leaves or wood chips, these can be pressed into pellets very easily.

So now we have our free fuel and now we can drive freely and if used to power a generator then we have standby electricity.

Here's the car conversion 

[Grumpy]

Google "wood gas":

https://www.google.com/search?q=wood+gas&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a