Get Out of the Car

Spring 2008

[Breathe Easier] “If you have otherwise healthy habits and don’t smoke, driving to work is probably the most unhealthy part of your day,” says Scott Fruin, Dr.P.H., assistant professor of environmental health at the Keck School of Medicine of USC. 

He reported in the journal Atmospheric Environment on a new study showing that up to half of Los Angeles residents’ total exposure to harmful air pollutants occurs while people are traveling in their vehicles. Results showed that the two main sources of pollution were diesel-fueled trucks on freeways and hard accelerations on surface streets.

Driving with the windows closed and recirculating air settings can modestly reduce the particle pollution exposures but does not reduce most gaseous pollutants.

To really reduce your exposure to pollution, spend less time in the car. Fruin recommends shortening your commute or taking the train. Biking or walking are alternatives that also provide valuable health benefits from exercise, he says.

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