Dirty City Air Stunts Kids' Lungs

Long-term exposure to high levels of air pollution causes reduced lung growth and function in children, according to a study of almost 3,200 Mexico City eight-year-olds.
They noted that the effect of air pollution on forced expiratory volume in one second (FEV1) a measure of lung function among children in the study was greater than the effect of exposure to mothers' smoking among children in the United States.