New Car Smell Is the Smell of Carcinogens

New Car Smell Is the Smell of Carcinogens

The average American spends almost one hour each day commuting to work, a number that adds up quickly.
Now, research has found that Californian car commuters can be exposed to above-acceptable levels of unhealthy chemicals during their daily work trips.
Estimating commuter times from census data and using measurements of chemicals detected in previous studies, the new study found commutes of more than 20 minutes put people at risk of unacceptably high levels of two carcinogens used in car manufacturing.
At first glance, it might seem like worrying news for people who spend a lot of time behind the wheel on daily commutes. But there are a lot of factors at play, so let's unpack it a little.
The distinct smell of a new car gives you a whiff of what's happening here. Materials used to fit out cars, from hard and soft plastics to adhesives, textiles and foam, contain some chemicals that can slowly seep into the air (the technical term is 'off-gas') or catch a ride on dust.
"These chemicals are very volatile, moving easily from plastics and textiles to the air that you breathe," said environmental toxicologist David Volz from the University of California Riverside, who co-authored the study.
Volatile compounds can build up in small spaces, such as inside a car (unless you open a window for fresh air).
While much research to date has focused on outdoor air pollution and its impact on health, and indoor environments, such as workplaces or homes where people spend most of their days, this study suggests chemicals building up inside vehicles could also be a concern - to some drivers.
The study aimed to estimate when a person's exposure to known carcinogens likely tipped over safe thresholds based on the time commuters spent inside their vehicles, and on the levels of five chemicals detected inside cars in previous studies.
The researchers predicted that commuters' daily exposure to two out of five chemicals studied - benzene and formaldehyde - would probably exceed levels considered safe or allowable by Californian health authorities after 20 minutes. The likelihood continued to rise the longer a person's commute.
The two chemicals of concern are not huge unknowns, but certainly warrant attention. Benzene is found in rubber and dyes, and formaldehyde is used in carpets and paints, and both are included on California's Proposition 65 lengthy carcinogen list. What's new here is looking at the risk these chemicals may pose to drivers specifically.
"Our study raises concerns about the potential risk associated with inhalation of benzene and formaldehyde for people who spend a significant amount of time in their vehicles, an issue that is especially pertinent to traffic-congested areas where people have longer commutes," the study authors wrote.

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