Often, buildings and the infrastructure around us, are designed as if people don't matter. The costs of designing without taking into account accessibility and designing with nature are becoming more and more obvious. For example, many of the tall square building in large urban centres are going to have to be reclad at the cost of millions and millions of dollars and pose a physical danger in high winds until these repairs are made. Integrated design that takes into account the ecological, social and economic imperatives are just a win win for any city. These seven cities that are starting to go car free are leading the way to sustainable urban development. As well, the health benefits of a more walkable city can be seen in this video, 23 and a 1/2 hours, by Dr. Mike Evans.