I am a student and don't like the idea of ethanol because of the conflicting purposes coming from it's source. I mean because it comes from crops that could also be food. I found jatropha biodiesel and really started to take interest in it. I found this company (Gold Star Biodiesel) and they are worth taking a look at, www.goldstarbiodiesel.com. Jatropha seems be a very promising source of fuel for the future. Anyone more intelligent than me have any insight as to why it isn't as prominant right now as WVO or ethanol and is this as promising as I think it is?