About one in 68 kids has autism spectrum disorder, according to the federal Centers for Disease Control and Prevention. And there are a number of contributing factors to that — both genetic and environmental.

But researchers now say exposure to high levels of ozone, combined with other factors, could put kids at a higher risk of developing autism.

Scott Selleck is a professor in the Department of Biochemistry and Molecular Biology at Penn State University, and one of the senior authors on the study.