Journal of Alternative and Complementary Medicine, 2008. Jan-Feb; 14(1): 79-85.
This is a review of literature available in 2008. The authors say many of the studies link exposure to toxins such as mercury, lead, and pesticides, as well as prenatal exposure to cigarette smoke, to high levels of autism and ADHD.
QUOTE: “Autistic spectrum disorders and ADHD are complicated conditions in which nutritional and environmental factors play major roles.”