Actually I didn't - I just grabbed the 1st couple of sites out of hundreds available on the subject to whet Pepsiman's appetite. Biofuels are getting increasingly interesting to a number of industries, including the airlines. Here's a more innocuous site with general info, for for those who are interested: <a href="http://en.wikipedia.org/wiki/Biofuel" target="_blank">http://en.wikipedia.org/wiki/Biofuel</a>