A report published in JAMA entitled “Association of Changes in Air Quality With Incident Asthma in Children in California, 1993-2014” confirms air pollution increases childhood asthma incidence.
“Conclusions and Relevance: Among children in Southern California, decreases in ambient nitrogen dioxide and PM2.5 between 1993 and 2014 were significantly associated with lower asthma incidence.”
“There’s been a concerted effort in California over the period of this study to reduce motor vehicle emissions in general and diesel emissions in particular,” John Balmes, an environmental health professor at the University of California, says. “And I think this study shows that it’s paying off.”
When LA’s Air Got Better, Kids’ Asthma Cases Dropped NPR