![Los Angeles](https://centerforhealthjournalism.org/sites/default/files/styles/teaser_list_thumbnail_large/public/title_images/Smog_pic.jpg?itok=DB2xR4n6)
A new study of kids in the Los Angeles basin found that as air quality “improved dramatically” in recent years, so did the capacity of children's lungs. The study's attributes the gains to more stringent emissions standards. But can the air quality gains continue amid a resurgent economy?