http://www.helium.com/knowledge/136066-how-urban-densification-solve-americas-problems-urban-sprawl-excessive.xml Helium.com > Environmental Awareness > How urban densification can solve America's problems with urban sprawl and excessive gasoline consumption en-us Copyright Helium.com Mon, 05 May 2008 19:39:55 GMT Mon, 05 May 2008 19:39:55 GMT