Chemical poisoning is a major public health concern. Approximately 95% of all accidental or intentional poisonings are due to chemicals. Nearly 90% of these cases occur at home. The smallest children, infants and toddlers, are at the highest risk for accidental (acute) poisoning. In 2000, poison control centers received well over a million calls about poison exposures to children younger than age 6. Chronic exposure is chemical poisoning that occurs slowly and insidiously over a prolonged period of time. Many chronic, degenerative diseases have been linked to environmental pollution or poisoning. The list may include cancer, memory loss, allergies, multiple chemical sensitivity, chronic fatigue syndrome, infertility in adults, learning and behavioral disorders, developmental abnormalities, and birth defects in children.