And also some people won't have enough water to drink, cook, wash etc. Yes there is an unlimited supply of seawater, and there are also a lot of places far awa

And also some people won't have enough water to drink, cook, wash etc. Yes there is an unlimited supply of seawater, and there are also a lot of places far away from seashore in regions with scarce water where people live, and once that scarce water is used it's not a very livable place anymore. See also the history of the Aral Sea, nearly completely disappeared because of Soviet cotton industry.