Now I know you are a retard
I might have just come to the same conclusion...
Corn fields are freaking huge. You could probably put a corn field AROUND an oil well. Also consider fertilizer, herbicides, pesticides... farms create a lot of pollution.
I also do not concede your point about utilizing a waste product- if McDonalds uses a bunch of cooking oil and throws it away... well who knows where it goes, but it probably stays oil. If you take that oil and burn it, you just liberated all the carbon that was bound up in that oil and put it into the air.
Maybe the thing biodiesel has going for it is, when you grow a plant and then burn it, you're binding and then releasing carbon that is in the atmosphere to begin with? Whereas with dino juice you're just liberating carbon that was buried? I would like to hear from someone who knows what they're talking about.
Google
Reduced Carbon Monoxide and hydrocarbons, increased Nitrogen compounds. Give a little, take a little