Most all the downsides have been disproven or are out and out lies. Like it takes 300% more energy to produce a gallon of alky than we get from it, a total lie. We get 40-45% more energy from a gallon of alky than it takes to produce it.
The University of Florida has developed a grass that can be harvested many times a year that develops far more alky/bushel than corn, pears are second.
Convert vehicles to run on alky not flex fuel and your fuel mileage goes up 25-30% along with 20-30% increase in horsepower. Vehicles designed to run on gasoline loose 25-35% fuel mileage because compression is too low. Alky does not detonate like gas so compression ratios can go way up. Alky does not flash like gas so accident scenes are much safer.
Google any of the top engineering schools and look at their research on this. I'm just parroting what they've done for the past 15 years.
We could easily support our combustion needs from alky produced here but no energy company will let that happen.
Mikey