[ought-six]

Well, in a pinch there is the old standby of manure and poop. Again, in a pinch.

[oldasrocks]

Maybe we can quit using corn for fuel?
Manure is still used. Just not enough to go around.

[marktwain]

Well, in a pinch there is the old standby of manure and poop. Again, in a pinch.

About half of the world's food supply depends on manmade fertilizer, mostly from natural gas.