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People need sunlight, though. Going extended periods of time without sunlight will lead to feeling tired all the time, from where it's easy to fall into depression. Would be really bad if that's the direction cities are going..

https://en.wikipedia.org/wiki/Artificial_sunlight

There are technical solutions, but I don't expect them to be applied, since they ain't applied now in conditions where they should.

Good luck maintaining all that roof and climate controlling what’s under it.

It already works for the other 50%.

The other 50% is divvied up into rooms with much smaller volume and exposed surface area.

Unless we're going to recreate and replicate the dystopian Kowloon Walled City this seems pretty wasteful and will only exacerbate warming with all the increased energy requirements.

RemindMe! 30 years

Wait, wrong web site.