These critics of new urbanism often charge it of elevating aesthetic over practicality , subordinating good city planning principles to urban design dogma .6 In addition , according to Matthew E . Khan (March 2006 ) that sprawl 's critiques often argue that suburbanization may offer private benefits but that it imposes social costs . This ``cost of sprawl ' literature posits that there are many unintended consequences of the pursuit of the ``American Dream ' that range from increased traffic congestion , urban air pollution , greenhouse gas...











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