Enough mingy, defeatist, thou-shalt-not science. Enough with crying resource-poor.

The great Rugby League halfback, Peter Sterling, was notoriously slow on his feet. The key to his success was that he never watched the opposition, only the gaps in the opposition. That’s what you guys seem to be doing. Love your work.

You would still need space for food production and industry. Vertical farming is being developed, or at least talked about, but I’m not aware of any vertical industry research. Of course, a mature nanotechnology would drastically affect both of these.

Also, I suspect it may be more efficient to build a smaller number of 10 mile towers than a large number of 1 mile towers. Btw, at 40,000,000 people per 10 mile tower, it’s only 250 towers for a population of 10 billion. 500 towers at half the density.