Archer Daniels Midland Co and ethanol advocates have criticized the plan of the American government on the use of biofuels, stating that it does not move through "the wall mix" due to the highly specialized market of credits for biofuels.

Hundreds of protesters gathered in Kansas city, Kansas, at the hearing to criticize the Office for environmental protection (EPA) because of the legislative proposal on biofuels, announced in late may.

A hearing held a few weeks after the EPA proposed to reduce targets laid down by Congress in 2007.

EPA reported that his project rather advance, and will not destroy the threshold of the mixture, which, as some argue, cannot be overcome without major infrastructure changes.

This is a key point of criticism of the programme of renewable fuel standards. Companies, including Chevron Corp., stated that the problem provides a basis for the reform or repeal of the program.

But supporters of biofuels reported that the threshold of the mixture cannot be destroyed, even if the bill will be used next year, given the narrow specialization of the credit market of ethanol.

Weak goals and "significant carry-over" means that the bill does not advance the threshold, according to representatives of ADM at the hearing. ADM produces approximately 1.7 billion gallons of biofuel each year.

Refiners will buy surplus, accumulated over the past year, instead of having to put large amounts of fuel in the mixture.

At the hearing he presented the first public arguments that the two most powerful American sector will use in the coming months to influence national policy on biofuels.

For corn producers and ethanol producers that have invested billions of dollars into biofuels and created new jobs, quotas are not high enough.

Oil companies can mix a gallon of ethanol with gasoline to receive identification number of renewable fuel (RIN) or buy credits from another company.

EPA underestimated the amount of loans available for the amount of 400 million gallons, according to representatives of the renewable fuels Association.

The oil refiners have complained about the high cost of compliance RIN. Credit prices increased in 2013, when they feared that they would not have the scale to achieve the goals.