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Ethanol is a dead end. Either you produce it the same way as today with massively polluting farming or you make it the same way as eFuels like synthetic gasoline and it is massively inefficient consuming far more energy than is returned.
The hydrogen for both green H2 or eFuel comes from splitting water with renewable electricity.
I didn't mention it above but another reason the eFuels aren't going anywhere for normal road transportation is that they have the same local emission problems as fossil fuels. NOx, PM, CO, HC are the same. Reducing GHG is generally talked about more when people talk about the need to move to renewables but just as important is reducing smog and pollution related disease in urban areas all around the world.
Looking at the available options - battery electric wins as the most cost effective way to reduce our carbon and local emissions from transportation. That is why companies around the world have focused their efforts on EVs. (We focus on meeting regulations in the most cost effective way). It is the economic winner even without subsidies if we continue to reduce the amount of pollutants allowed from our transportation sector.
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