The term urban sprawl generally has negative connotations due to the health and environmental issues that sprawl creates.[2] Residents of sprawling neighborhoods tend to emit more pollution per person and suffer more traffic fatalities.[3][4] Sprawl is controversial, with supporters claiming that consumers prefer lower density neighborhoods and that sprawl does not necessarily increase traffic.[5] Sprawl is also linked with increased obesity since walking and bicycling are not viable commuting options.[6] Sprawl negatively impacts land and water quantity and quality and may be linked to a decline in social capital.[4]

From: http://en.wikipedia.org/wiki/Urban_sprawl

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Suburban Sprawl October 1, 2000 Florida, USA [1]

Former Everglades in Florida [2]

Orange County, California [3]

Another shot of the OC, in California [4]

LA from above. [5]

Florida again. [6]

A freeway in LA. [7]

More LA. [8]

Arbor Lake - Calgary, Canada. [9]