Derrick Hubbard, 6 years old (shown here with his mother), has speech and vision problems. He lives in Anniston, Ala., a city that was home to a Monsanto plant, which for decades saturated west Anniston with polychlorinated biphenyls (PCBs). Now, a growing body of evidence suggests that compounds called neurotoxicants, which include PCBs, may be contributing to an increase in childhood disorders such as Derrick's. Robert MacPhail, chief of the EPA's Neurobehavioral Toxicology Branch, cautions, "There are still a jillion tests that have to be carried out." Full story.