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A link between autism and air pollution exposure during pregnancy has been suggested by scientists.
The Harvard School of Public Health team said high levels of pollution had been linked to a doubling of autism in their study of 1,767 children.
They said tiny particulate matter, which can pass from the lungs to the bloodstream, may be to blame.
Experts said pregnant women should minimise their exposure, although the link had still to be proven.
Air pollution is definitely damaging. The World Health Organization estimates it causes 3.7 million deaths each year.
The study, published in Environmental Health Perspectives, investigated any possible link with autism.
The Harvard School of Public Health team said high levels of pollution had been linked to a doubling of autism in their study of 1,767 children.
They said tiny particulate matter, which can pass from the lungs to the bloodstream, may be to blame.
Experts said pregnant women should minimise their exposure, although the link had still to be proven.
Air pollution is definitely damaging. The World Health Organization estimates it causes 3.7 million deaths each year.
The study, published in Environmental Health Perspectives, investigated any possible link with autism.
Autism link to air pollution raised
A link between autism and air pollution during pregnancy has been suggested by scientists.
www.bbc.com
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