Texas researchers have found a possible link between autism and mercury in the air and water.Studying individual school districts in Texas, the epidemiologists found that those districts with the highest levels of mercury in the environment also had the highest rates of special education students and autism diagnoses.
The study does not prove that mercury causes autism, cautioned the lead author, Raymond F. Palmer of the University of Texas Health Science Center in San Antonio, but it provides a "provocative" clue that should be further investigated.
"Mercury is a known neurotoxin," said Dr. Isaac Pessah of UC Davis' MIND Institute, who was not involved in the study. "It's rather intriguing that the correlation is so positive," meaning that there was a strong, direct relationship between mercury and autism levels. "It makes one worry."