The whole complex comes in at about 34 km^2 which puts the population density at about 10 times the density of Manhattan. The water and energy needs alone will

The whole complex comes in at about 34 km^2 which puts the population density at about 10 times the density of Manhattan. The water and energy needs alone will require several key innovations before this becomes even a pipe dream. Household and public space water usage could be a billion gallons of fresh water a day.