Okay, so "Biafra" is a bit dated, but this old Jay Leno video from the 1980s has one of my all time favorite routines of his, about Mr. Potatohead. (See about the 2 minute mark.)
How do you explain to a starving kid in Biafra, Leno asks, that in America we grow food for amusement purposes? He quotes Kimba: "Kimba eat potato." "No, no, Kimba--you put this little hat on it."
Well, he can update this routine now with corn-based ethanol as his example.