>>13259671Use more nuclear power. Humans do not take up much space at all, what takes up space is our resource generation in the form of farmland, mining, useless "green energy" installations like solar and wind, and to a much lesser degree manufacturing.
All humans in North America could easily be housed in arcologies located entirely on the coastline with a few miles between them, with all the food production etc integrated, if you got a reactor in the basement.
