The number and severity of the issues will tend to increase with increased ethanol content .

FORBES: Biggest Battle Yet for Biofuels Begins

Furthermore, Becker states, ethanol has a lower energy content than gasoline, so to meet the same energy demands, more gallons of ethanol would have to be produced.

NPR: Environmentalists Weigh In on Ethanol

And the energy content of ethanol is only two-thirds that of gasoline.

FORBES: Magazine Article

As an example, Jamaica imports HYDROUS (with 5% water content) ethanol from Brazil and removes that water in Jamaica to turn it into ANHYDROUS ethanol (nearly 0% water).

FORBES: Further Implications Of The U.S. Ethanol Tariff

Remember that ethanol has less energy content than gasoline.

FORBES: Field of Dreamers

Some have even calculated a ratio less than one, meaning it takes more energy to produce ethanol from corn than the energy content of the fuel.

FORBES: Ethanol Isn't Worth Costlier Corn Flakes And Tortillas

In 2011, about 40% of U.S. corn crops were diverted to ethanol (a quarter, if we take into account that nutritional content is recycled back into feeds for animals in the form of distiller grains).

CNN: Extreme heat and droughts -- a recipe for world food woes

Upping the sugar content in the cane would lead to a higher yield of ethanol per acre.

FORBES: A Whole New Crop