Craig Eyermann explains why President Trump’s push to expand the use of ethanol in cars is a bad call for many reasons:
For example, because ethanol packs less energy per gallon than gasoline does, vehicle owners can expect to get even lower fuel mileage from the expansion of E15 fuel (a blend of 15% ethanol with 85% gasoline) under the new mandate to include more ethanol in automotive fuels, which would be 4% to 5% less than they would achieve if they only filled their vehicles with 100% gasoline. Today’s vehicle owners already pay a fuel efficiency penalty of 3% to 4% lower gas mileage from the E10 ethanol-gasoline fuel blend mandated under the older ethanol content rules, where the new rules will require even more fill-ups.
Beyond that, to the extent that it diverts corn from food markets to fuel production, corn-based ethanol production also jacks up the price of food—the corn itself, plus everything that eats corn, like beef cattle. One review of multiple studies found that the U.S. government’s corn-based ethanol mandates added 14% to the cost of agricultural commodity prices from 2005 through 2015.
Last summer, the Environmental Protection Agency also found that burning increasing amounts of ethanol has made America’s air dirtier because it generates more ozone pollution, which contributes to smog formation. Worse, growing the additional corn to make more ethanol has also increased agricultural fertilizer runoff pollution in the nation’s rivers and waterways.
That runoff has been linked to the increased incidence of harmful algal blooms, which have been responsible for contaminating drinking water and contributing to red tide events in coastal regions, where fish and other aquatic organisms have been killed off.
There is a solution to these federal government-generated pollution problems: stop forcing corn-based ethanol to be used in the nation’s fuel supplies. There’s even a case study from Brazil, where the city of Sao Paulo found that its air became cleaner after it switched from ethanol-based fuels to gasoline in the years from 2009 to 2011.
