A study published in The Lancet Neurology admits that mercury and fluoride are industrial chemicals that can "injure the developing brain" and can cause Autism, Attention Deficit Hyperactivity disorder and other neurological problems.
"Neurodevelopmental disabilities, including autism, attention-deficit hyperactivity disorder, dyslexia, and other cognitive impairments, affect millions of children worldwide, and some diagnoses seem to be increasing in frequency. Industrial chemicals that injure the developing brain are among the known causes for this rise in prevalence. In 2006, we did a systematic review and identified five industrial chemicals as developmental neurotoxicants: lead, methylmercury, polychlorinated biphenyls, arsenic, and toluene. Since 2006, epidemiological studies have documented six additional developmental neurotoxicants—manganese, fluoride, chlorpyrifos, dichlorodiphenyltrichloroethane, tetrachloroethylene, and the polybrominated diphenyl ethers."
Even though the government and medical system would like you to believe that the vaccine/autism link has been "debunked" scientific research, court cases (US, Italy) parents of vaccine injured children, and cdc whistleblowers, tell a different story.
Robert Kennedy On Vaccine/Autism Link
Neurobehavioural effects of developmental toxicity
http://www.thelancet.com/journals/laneur/article/PIIS1474-4422%2813%2970278-3/fulltext