[analog31]

All ideas for "fuels" hinge on the future availability of an economical energy source, which would have to be either solar or nuclear.

[outworlder]

I wonder what happened to the Navy's attempts at synthesize aviation fuel in aircraft carriers. They have plenty of power (newer carriers have even more) and reducing or eliminating the need of support craft for fueling would be a massive bonus.

They've been looking at that for a while, I don't know what issues they encountered.

[thinkcontext]

They couldn't get it to be efficient enough.

[ulrikrasmussen]

Yes of course, I am not claiming otherwise.

My point was just about the scarcity of concentrated co2.