(KMOV) -- There is a disturbing study out about children and drug use.
More kids and teens are smoking marijuana and at younger ages.
According to a study by the National Survey on Drug Use and Health, from 2008 to 2009 there was a nine-percent increase to 7.3-percent of all people ages 12 and older.
The average age for first-time pot smoker dropped to 17.
The human brain is still developing through the teen years. That's why experts say marijuana use can lead to a variety of health issues.