The American Lung Association endorses ethanol.

Lung-scarring ground-level ozone comes from unburned fuel vapor (either leaked drops or evaporation during the refueling process, or emissions from imperfectly complete combustion) interacting with emitted NOx.

When burned, ethanol emits less NOx than gasoline.

Unburned ethanol vapor is LESS THAN A TENTH as reactive to NOx as gasoline vapor is.

On top of that, ethanol is cleaner for many other reasons as well:

Gasoline emits smoke, soot, and particulate matter, the cause of, among other things, black roadside snow.  Ethanol emits no SSPM at all.

Gasoline emits sulfur, the cause of acid rain.  Ethanol emits no sulfur.

Gasoline can only prevent gunk by using cancer- and birth-defect-causing aromatics (benzene, toluene, xylene).  Ethanol is inherently gunk-free, needing no such add-ins.

When spilled, oil and its derivatives need chemical dispersants & physical cleanup.  Ethanol is consumed for calories by fauna & dissolves on its own