PHOENIX -- University of Southern California doctors said one in 10 children get asthma because they live near busy city streets and freeways.
The study focused on the effect of pollution on children in the Los Angeles area but found metro areas with large numbers of kids living near heavy traffic are also at risk because of pollution from cars, buses, etc.
The results don't surprise Dr. Kelvin Panesar, director of pediatric pulmonology for Banner Health. He said he's seeing more younger patients with asthma.
"Whether that's traffic and particulate matter from pollution or exposure to dust you'll be more likely to develop asthma symptoms. Inner city with high traffic you don't have a lot of fresh air to breathe," Panesar said.
As far as protecting children from the harmful effects of pollution he said keep the kids indoors during the warmest times of the day and to spend outdoor time early in the morning and late afternoon.
Arizona Asthma Coalition said 8 percent of all of the state's schoolchildren have asthma.