Pesticide chlorpyrifos is linked to childhood developmental delays

Pesticide chlorpyrifos is linked to childhood developmental delays  
http://www.eurekalert.org/pub_releases/2010-03/cums-pci031810.php
 
"Exposure to the pesticide chlorpyrifos—which is banned for use in U.S. households but is still widely used throughout the agricultural industry—is associated with early childhood developmental delays, according to a study by researchers at Columbia University's Mailman School of Public Health."