Excerpt from TreeHugger.com:
It is a theme on TreeHugger that living walkable communities and dense cities use less energy per capita, and that the auto-centric suburb is perhaps the worst of all planning models if we want to reduce our energy and particularly our oil consumption. But do people really want to live in high density apartments if they have the choice? A new Canadian study indicates that for a number of reasons, more and more people do.
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http://www.treehugger.com/files/2010/10/new-study-apartments-cars.php