Ethanol producers get a tax credit 51 cents a gallon, much to the delight of industry powerhouses such as Archer Daniels Midland.

They run some of the world’s best companies, such as PepsiCo, Archer Daniels Midland and W.L. Gore.

Although agribusinesses such as Archer Daniels Midland have built many ethanol refineries, farmers' co-operatives and local investors have also been busily building as well.