Study: Secondhand smoke raises risk of neurobehavioral disorders in kids

Children exposed to secondhand smoke in the home have a 50 percent increased risk of developing two or more neurobehavioral disorders compared to children who were not exposed at home, according to a new study from the American Academy of Pediatrics.

The disorders include learning disabilities, attention deficit hyperactivity disorder (ADHD) and other behavioral problems.

Another study shows that children who describe the smell of cigarette smoke as "unpleasant" or "gross" are 78 percent less likely to start smoking. That's compared to other children who have a more passive reaction to the smell.