An eco-city at every spike

One can't help but think of the doomed Biosphere project when reading about this, but the idea behind Arcosanti is at least pushing some urban planners in an interesting direction. This article in the Financial Times about the Arizona development, which involves ecological city design geared toward pedestrians and efficiency, makes the idea seem like a logical extension of the "spiky" argument. If people really are gathering in centers around the world in which to pursue certain industries, there are worse ways to deal with that concentration of people than this. "Gathering a greater density of people to live and work in one place not only benefits the environment, by requiring less expenditure of energy for things like heating and travel, but also allows people to feel part of a community."