Traffic fumes cause brain damage, autism?

“The evidence is growing that air pollution can affect the brain.”

The Wall Street Journal reports,

Congested cities are fast becoming test tubes for scientists studying the impact of traffic fumes on the brain.

As roadways choke on traffic, researchers suspect that the tailpipe exhaust from cars and trucks—especially tiny carbon particles already implicated in heart disease, cancer and respiratory ailments—may also injure brain cells and synapses key to learning and memory.

New public-health studies and laboratory experiments suggest that, at every stage of life, traffic fumes exact a measurable toll on mental capacity, intelligence and emotional stability. “There are more and more scientists trying to find whether and why exposure to traffic exhaust can damage the human brain,” says medical epidemiologist Jiu-Chiuan Chen at the University of Southern California who is analyzing the effects of traffic pollution on the brain health of 7,500 women in 22 states. “The human data are very new.”

The article goes on to say,

To be sure, cars and trucks today generate one-tenth the pollution of a vehicle in 1970. Still, more people are on the road and they are stuck in traffic more often. Drivers traveling the 10-worst U.S. traffic corridors annually spend an average of 140 hours, or about the time spent in the office in a month, idling in traffic, a new analysis reported.

No one knows whether regular commuters breathing heavy traffic fumes suffer any lasting brain effect.

Although we’re quite sure that the junk scientists, like Frederica Perera mentioned in the article, will soon flood journals with weak association studies correlating ambient air with autism, there is and will be no biological plausibility to support such claims — but that won’t make a difference to Perera et al.

Read the Wall Street Journal article.

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