[onemoreact]

I often fill up with 10% ethanol gas which most cars can burn just fine, but the entire world's supply of ethanol is not enough to replace 10% of total demand with ethanol. We throw away enough feed-stock in the US to double world wide ethanol production, but it's simply not cost effective process it yet.

PS: It's not that far off though the US accounts for ~44% of the world’s gasoline consumption, but it's would take ~57% of the world's ethanol to switch every gas pump in the US to 10% ethanol.