There will be more and more of these grand scheme "ecological" solutions promoted as capitalists frantically try to profit off of planetary collapse. They will always have flashy, idiotic names like "The Line," and they will always be premised upon indigenous displacement and death.
People have known how to live sustainably in the desert for millenia. It hasn't been by building 170km long hi-tech mega-city abominations. None of this comports with a civilization that is earnestly trying to survive on this planet. It's all more extraction, more hoarding, and more death for the undesirables and the dissenters.
From BBC:
Neom: Saudi forces 'told to kill' to clear land for eco-city
This megalomania is all about eco-modernism and green #capitalism notoriously overstretching the capacity of living organisms to reproduce in a sufficient way.
They just don't want to realize that the expenditure of more, hotter and faster incineration
results in wastelands of industrial decrease in contrast to which the desert is full of life and energy
which stays available as it's not spend for surplus profit and burned away for power explosions whether in a shell to kill or an combustion engine for power projection.
So deserters of the world unite
to never ever return to the fallacy of limitless burning away what a finite planet has to offer in such beautyful diversity and unknown potential