you seem to forget that 70% of the earths surface is water so a more logical step would be to first colonize the ocean surface not to mention here in australia 60-80% of the population lives near the coast leaving room for potentially billions more ppl
also keep in mind the average building height in your city and try and imagine how many more ppl you could cram in if each building was 10 stories higher
resources are a bit trickier but i dare say we will master sub oceanic mining way before we figure out how to get an excavator into space and bring back a few semi trailers worth of iron ore
also keep in mind the average building height in your city and try and imagine how many more ppl you could cram in if each building was 10 stories higher
resources are a bit trickier but i dare say we will master sub oceanic mining way before we figure out how to get an excavator into space and bring back a few semi trailers worth of iron ore