Here is an article about alternative energy. I don't know about the possibility of growing switchgrass to produce 1000 gallons of ethanol per year per acre. One correction I would make to the article is that ethanol only has about 2/3's as much energy as gasoline, so we would need 50% more ethanol than gasoline. It is a bit of a nit compared to the big picture I guess, but running pure ethanol is not very practical in automobiles (hard to atart in cold weather) so probably E85 is what would actually be used. (A car designed to run only E85 would be more efficient than a gasoline engine because the higher octane of ethanol lets a higher compression ratio be used). Here is the article:

http://brookesnews.com/081606obamagreens.html