Associations of urban greenness with asthma and respiratory symptoms in Mexican American children

Asthma is one of the most common childhood chronic conditions with approximately 19 million adults and seven million children affected in the United States alone. 1 The etiology of asthma and other allergic conditions is not fully understood, but environmental and lifestyle factors have been implicated in the inception of these conditions. In the United States, the prevalence of asthma and asthma related symptoms is disproportionately high in urban poor neighborhoods.2-4 Although this might be due partly to sociodemographic factors, studies have suggested that urbanization and its detrimental impact on the natural environment and lifestyle might increase the risk of respiratory conditions.

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