As far as i know, ethanol and all biofuels are/were a dead end. They were used purely for farmer subsidies and the energy independence was an excuse.
https://smartcitysweden.com/focus-areas/mobility/biofuels/
But the numbers don’t add up. Instead, it looks like they’re simply burning less gas (biofuels or not):
"It is important to note that biofuel production and consumption, in and of itself, will not reduce GHG or conventional pollutant emissions, lessen petroleum imports, or alleviate pressure on exhaustible resources."
I.e., what the government claims it to be.
Hence my sarcastic comment about trusting the government and its "experts".
https://www.energy.gov/articles/biofuels-greenhouse-gas-emis...