The use of flame-retardant chemicals in cars is unregulated and unmonitored, and is based on an outdated flammability standard that may not actually improve safety. Many flame retardants have been linked to cancer, fertility issues, thyroid disease, and neurotoxicity. When they're applied to things like car seat foam, these chemicals leak into the air where they can be inhaled or ingested by drivers and passengers.
Considering the average driver spends about an hour in the car every day, this is a significant public health issue. It's particularly concerning for drivers with longer commutes as well as child passengers, who breathe more air pound for pound than adults.
The researchers tested the air inside 101 cars manufactured since 2015. Participants hung silicon strips from their rearview mirrors for seven days to absorb any flame retardants present. Temperature was also a factor studied in the release of these potentially harmful chemicals.
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