corn, ethanol, biodiesel, plant oil, and wind!
Now here's someone thats doing something good for all of us. this is pretty cool stuff, getting rid of waste as well as stopping their own dependance on fossil fuels! now if every pizza place did this!
If your interested in how they did this and how to do it yourself if you have a diesel engine in your vehicle here's a few links for you to check out. http://www.greasel.com/ , http://www.greasecar.com/index.cfm
just a word on biofuels. I feel that these are the most viable alternatives to fosil fules. They are a rewable resource something that fosil fuels like oil and coal are not, they also polute less and are free or very low cost, if you happen to be slightly enterprising.
Now moving on to ethanol, the other alternative combustable fuel! theres been several stories about it ive been finding recently. everyone knows ethanol. you know, the 89 octane gas with the corncob on it? if you didnt, you do now. In my honda currently im alternating between 91-93 octane premium and 89 octane ethanol in half tank intervals, so far it seems quite good for mileage and preformance/price ratio, considering that gasoline is $2.70 - 3.14 a gallon...
usnews.com ethanol story
popularmechanics.com ethanol story