“If you want to see what the cutting edge of next-gen clean energy innovation looks like, it’d be hard to find a place better than Texas. Amazing companies are breaking ground not just here in Southeast Texas but across the state. Each one represents a huge boon for the local economy,” - Bill Gates
Quick run-down:
e-fuels: equivalent of $45/gallon gasoline with today’s tech. Might get that down to $15/gallon if it scales up. It’s plausible for aviation, but other choices (eg: electric) are cheaper for surface transport
carbon materials: tiny amounts of CO2 if it can be made cost-effective
DAC: in general, this has the problem of being vastly more expensive than not emitting in the first place. That’s why the IPCC considers it to be a tiny and expensive part of what needs to happen in the next few years.