Only the "rich" people wont need it...they get bottled water delivered, and by the time things get bad enough...they will have their very own water plants etc.

PS: I will find the data sets from the "studies" I encountered while studying for all this Malthusian related stuff in previous classes later once I go back through all my notes from a couple years ago which will explain and support my position on the relationship between legalized abortion and population growth.