Two Published and Two Unpublishable (?) Urban Plans

In this Chapter we are going to give a fast look at four urban plans: The outline of two such plans has already been published; two more plans offer such a futuristic vision for our cities and towns that their details might not be published in the foreseeable future. The Chapter also introduces a daring plan for the use of marine water to save perhaps two-thirds of the precious fresh water supply. This plan was conceived by my nephew Giovanni Papa.