New research from the University of Cincinnati and Cincinnati Children's Hospital Medical Center finds kids who live near or attend school near a major highway or interstate have an increased risk for attention deficit hyperactivity disorder (ADHD) because of the traffic- related pollution.

Lots of kids could be at risk

Studies have shown 40% of children attend school within 400 meters of a major highway. Another 11% of the population in the U.S. lives within a 100 meters of a four-lane highway.

The developing brain is the concern