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In his book, Urban Sprawl and Public Health, public-health advocate Richard Jackson says that "our car-dependent suburban environment is killing us". "If that poor woman had collapsed from heat stroke, we docs would have written the cause of death as heat stroke and not lack of trees and public transportation, poor urban form, and heat-island effects. If she had been killed by a truck going by, the cause of death would have been 'motor-vehicle trauma,' and not lack of sidewalks and transit, poor urban planning, and failed political leadership."