there is only so much land There is way more land than needed, if only we build cities dense enough. Have a look at e.g. Hong Kong's density: The Kwun Tong dis

there is only so much land There is way more land than needed, if only we build cities dense enough. Have a look at e.g. Hong Kong's density: The Kwun Tong district in HK has 57250 persons per square kilometre [1] which, assuming the world is 7*10^9, means we could house them on a mere 122270 m^2 (about 1/5th of Texas). [1] https://www.gov.hk/en/about/abouthk/factsheets/docs/population.pdf https://www.gov.hk/en/about/abouthk/factsheets/docs/populati...