On Thursday, April 21, 2005, at 11:17 AM, siufai@xxxxxx wrote: > Biodiesel is a common fuel in Germany. AFAIK, your car need to be > tuned to run well on it. Price at the station is about the same as > regular diesel but there is no "carbon-tax" on it. So the > "manufracturing-costs" of biodiesel must be much higher than regular > diesel from oil. IMHO, the "manufacturing costs" are higher for bio-fuels compared to fossil fuels only because we are wasting the stuff (using it in engines which are around 80 per cent INefficient!). If we were to take into account the REAL costs to society of using biologically-produced fuels, it would probably turn out to be LOWER than those of fossil fuels. But then again IS fossil fuel really from fossils? Prof. Gold of Cornell University, with whom I briefly corresponded a while back, says no - and I tend to believe him. Cheers. Ardeshir <http://homepage.mac.com/ardeshir>