https://www.autoguide.com/auto-news...ic-fuel-could-save-the-combustion-engine.html
"There’s another important percentage Porsche touts too: 70, as in the percent of Porsches ever produced that are still on the road. The German company acknowledges that many of today’s cars still run on gasoline. Simply removing them from the global fleet isn’t a tenable option for a variety of reasons. Instead, Porsche and Siemens are working together to craft synthetic fuel dubbed eFuel, and it could dramatically reduce emissions to augment the world’s move towards more sustainable motoring.
...
eFuel is instead a derivative from hydrogen. The process begins with electrolysis, which splits water into hydrogen and oxygen gases. From there, Porsche and Siemens use captured carbon dioxide from the air, in combination with the hydrogen, to form synthesized methanol.
The methanol could then be used in ExxonMobil’s
methanol-to-gasoline (MtG) process, at which point it could be blended to current fuel standards."