In the near future, cars and trucks will be electric. This is shuffling deckchairs on the titanic. Why not put 100% of your efforts into electric vehicles powered by 100% renewable sources?
I agree we need to do something now, but this is just putting off the inevitable. Re-engineering dirty fuel sources doesn't buy us time to resolve this. It is procrastinating, shuffling titanic deckchairs.
The main advantage of this tech I can see is making 'primary' sourced fuel illegal, 'secondary' sourced fuel like this prohibitively expensive, and forcing everyone to go pure electric engine by economy.
Such technology would make gasoline have no output, since the ouptuts would be reabsorbed. If anything, electric cars, due to the massive environmental damage due to rare earth mineral mining, would be more of an environmental disaster.
It sounds like you're suggesting that burning the fuel releases more carbon than was used to produce it, which isn't possible.
All fixable things, but will take tens of years. Let me use carbon neutral petrol
The idea and processes behind Prometheus are still very interesting and have implications beyond the short-term focus on carbon footprint. This type of process will likely be needed to manufacture fuel on other planets.