While recyling used veggie oil is relatively clean and works at the individual level, don't be fooled into thinking going big scale bio or ethanol is the answer - one has to factor in the actual initial processing of the oil from corn or whatever - there's some cost there that doesn't ever seem to make it in all those treatises you see online. Those big grain producers consume a lot of fuel to make it happen (mostly gasoline for equipment, etc) - turning corn into some type of ethanol or biofuel has the oil companies laughing all the way to the bank due to increased gas consumption on the farms - plus now it's wrapped in a "green" wrapper - all the rage.

I just read about some new solar panels that are made of etched aluminum that are extremely efficient - super cheap to produce and doesn't have the issues with damaged panels killing energy production. All this talk of fuel amounts to the same thing - storage of the sun's energy (just about anything that's burned started out as sunlight - to plants, to animals, and so on). If we really want to make things happen let's skip all the crap and go right to the source!

-- John