The built environment of suburbia is extremely hostile to children's most basic needs

http://www.raisethehammer.org/index.asp?id=073
Child Friendly Cities
Despite airs of child-friendliness, the actual built environment of suburbia is extremely hostile to children's most basic needs.
By Ryan McGreal Apr. 14, 2005

Reviews
Our society makes a show of being child friendly, from playgrounds at fast food restaurants and furniture warehouses to the vast array of child-protection devices available to consumers. At the same time, our actual built environment is extremely hostile to children's most basic needs.
Richard Gilbert and Catherine O'Brien, writing for the Centre for Sustainable Transportation, have surveyed a huge body of research on how our built environment affects children, coming up with a list of 27 guidelines for creating safer, healthier communities.

According to Child- and Youth-Friendly Land-Use and Transport Planning Guidelines, children need fresh air, exercise, time to run and play, and a chance to move through neighbourhoods and interact with others. Instead, they are strapped into car seats and shuttled from destination to destination, missing exercise, breathing poisonous exhaust, and isolated from their communities. The low density development of "family friendly" subdivisions all but guarantees that parents must drive their children anywhere they need or want to go.

Children who do try to walk face automotive exhaust and the gauntlet of speeding cars if they want to get anywhere. The constant noise of traffic increases children's stress levels and the presence of cars forces children inside, where their opportunities to play and exercise are severely limited.

The results of sprawl development are clear: overweight children at higher lifetime risk of diabetes and heart disease, a significant increase in respiratory illness, even measurable effects on emotional development, concentration, and school performance.

These factors affect everyone's health, but children are especially susceptible, because their bodies are still developing and their lifestyle habits are still forming. Children also eat, drink, and breathe more by body weight than adults, increasing their rate of exposure to toxins.
Cars make low density development possible, and low density development requires cars. When buildings are spread out, distances between destinations are too far to walk and public transit systems can't operate efficiently. Further, the preponderance of cars on the road creates an unpleasant and unsafe environment for those people who do try to walk, further reinforcing car use.