Compared to what?
Where does the energy come from to "split water into H2 and O2"? Where does the energy come from to "filter CO2 out of the air"?
The same place the energy comes from to charge your Tesla?
That’s my point. They push Teslas as “zero emissions” which may be true at the car, but not at the power plant putting juice into the grid.
It’s the same with this process to make “green gasoline.” They are pushing the emissions back to the power plant to make the electricity to split the water into H2 and O2.