Biofuel: Is it a greenhouse gas, gas, gas?
In think I have said this before, but I will repeat it anyway. It all depends where the biofuel comes from. You can make biodiesel from spent frying oil – or even rendered animal tallow. Since these are waste products, utilising them should not increase greenhouse gas emissions, except to the extent that processing and transporting these fuels uses energy too. The net effect ought to be beneficial. If you grow crops without resorting to artificial fertilizers (nitrogen) or if you use crop waste, then you may also reduce ghg. But it has been known for a long time that the US ethanol boondoggle was just a way for presidential candidates to get votes from constituencies that happen to be important in the early rounds of the primaries (see “The West Wing” passim). And it is no surprise either that rape seed (we call it canola) biodiesel is another Euro sop to the farm lobby. The wine lake should make some good ethanol though.
I have been around the alt.fuels business for long enough to recognize that nearly every one that has been brought to market to date has had some or many drawbacks. There is a reason that petrol retains its market share and it is not just the cabal of big oil.