The “organic movement” has roots (pardon the pun) in studies about harmful effects of pesticides. Pesticides Linked to ADHD Symptoms. A new study (conducted by Canadian researchers used data collected from nearly 1,140 children participating in the United States Centers for Disease Control and Prevention’s National Health and Nutrition Examination Survey) suggests more bad news about pesticides. There seems to be a link between level of exposure to pesticides and the development of ADHD symptoms. This MSN Childhood Health article (by Leah Zerbe Rodale) states that “this study is the first to look at everyday exposure levels in children from around the country. And as it turns out, U.S. kids are exposed to harmful levels of pesticides in their food, day in and day out.” The take-home message is: avoid using pesticides around your own lawn, and–if possible–try to buy organic foods.