A new study published this week in the journal Pediatrics has identified a link between certain types of pesticide exposure and Attention Deficit-Hyperactivity Disorder (ADHD) in children.

The study included 1,000 children, researchers found that those who had high levels of pesticides called organophosphates were almost twice as likely to develop Attention Deficit-Hyperactivity Disorder.

Organophosphates are used to kill pests by attacking their nervous systems, according to the San Francisco Chronicle.

CBS News reports that the most widely used organophosphate is malathion, which was used heavily in 1980's and again about a decade ago to fight the West Nile virus.

Read More: Pesticides Tied to Hyperactivity in Children (CBSNews.com)