Some counterpoints:

- Ethanol effectively helps spread carbon emissions across a larger area. It significantly cleans the air around large cities, I guess at the expense of more emissions in rural areas? But then again I'd guess most of those rural areas are not super concerned about carbon emissions and are very supportive of corn subsidies.

- Of the three goals of adding ethanol to gasoline, it seems like 2 of 3 of them are completely successful: "The policy was intended to reduce emissions, support farmers, and cut U.S. dependence on energy imports."