By Adele Peters – For decades, Phoenix was the poster child for sprawl: Before the housing crash, developers were building 60,000 new homes a year in the desert at the edges of the city. But when the market fell apart and some of those new neighborhoods turned into instant ghost towns, the city learned its lesson and committed to moving in the other direction–walkable neighborhoods connected by public transit.
With narrower streets, buildings will naturally start to shade the sidewalk. The plan also calls for trees and other plants along streets; despite the fact that Phoenix is in the middle of the desert, it’s located on top of aquifers and also has a hidden system of canals underground that were originally built by the prehistoric Hohokam tribe [2, 3, 4]. more> http://tinyurl.com/o82hx7o