The only viable solutions are e-fuels, which produce fuel from electricity, water and CO2. However these are usually used as distraction, because they cannot be produced at a relevant scale for a reasonable price. The hope is to just burn fossil fuels as long as possible by providing an alternative that will soon solve all the problems. Currently there are only a couple pilot plants working. The price is around 6€ to 8€ per liter and is not expected to go down significantly.

For other industries such as steel (in the form of green hydrogen) or aviation these e-fuels are the only option to decarbonize. They will pay whatever they need. Better not compete with them for this scarce resource.