Researchers were interested in lung function during adolescence. “When kids hit puberty, their lungs start to grow qquite quickly,” Avol explains. “Girls’ lungs grow until their early 20s.” 20s and then slowly declines with age.So what happens during that big growth spurt during the teen years may be especially important later in life. Avol and colleagues hope to follow the children as they progress into adulthood, to better understand any persistent and long-term effects of pollution.br>