Re: Case study
It has been proven that we can take pollutants from the atmosphere and using solar reactors make a petrol/diesel analogue that can be formulated cleaner.
The conversion efficiency is dismal, whether using some of the experimental catalysts or membranes, or using wind power to dissociate water. Invariably with all approaches there's a gas handling element where compression and decompression energy losses are significant, plus processing losses. And at the end of all that it wouldn't be any cleaner at point of use - you'd still get as much NOx and particulates as you would from a refined fossil fuel, since those aren't caused by fuel impurities.