My preferred solution is buttloads of nuclear, carbon neutral solutions to liquid fuel (e.g. pulling CH4 out of atmosphere with Sabatier) and general carbon capture.

While producing clean energy would be great, a significant share of our travel issues is related to land use.

Ok, but... airplanes use the least land?

Much like the difference in land use with or without cars is not simply roads and parkings, but also the horizontal development of cities rather than vertical, the land use involved by planes is not simply the airstrips. Among others, it is also all the land developed specifically for vacation in remote places. If you look at [1] for instance, this area would simply not be developed if planes were not a thing.

[1]: https://www.google.com/maps/@21.1715988,-86.8077681,1041m/da...

What is wrong with vacations in remote places?

What mass extinction? From climate change? Has the Intergovernmental Panel on Climate Change said that because I’ve never seen that as a scientific claim.

We are currently going through a well-documented extinction[1]. It's not recent in human terms, but it's been accelerating recently, with industrialization.

Climate change is not the only, nor the major cause in the current extinction, but it contributes. In a way, this is unfortunate: it would be easier to have only one problem.

The relevant body for scientific information is not the IPCC, but the IPBES [2]. Like the IPCC, it releases reports summarizing the situation and its causes [3].

[1]: https://en.wikipedia.org/wiki/Holocene_extinction

[2]: https://en.wikipedia.org/wiki/Intergovernmental_Science-Poli...

[3]: https://en.wikipedia.org/wiki/Global_Assessment_Report_on_Bi...

I don’t think it’s necessarily the commenter’s solution but it does seem to be the one the world is going all in on.

It's hard to take something away from people once they have already had it. Yet if we had never discovered flight then we wouldn't spend much time lamenting the lack of air travel. Instead we would get on with life within the limitations we have just like we do for other constraints.