Study says people are breathing in cancer-causing chemicals in their cars

People may be exposed to cancer-causing chemicals while sitting in their cars, warned a recent study published in Environmental Science & Technology on May 7. The study revealed that most cars contain flame retardant chemicals, including TCIPP, TDCIPP, and TCEP, which are under investigation by the U.S. National Toxicology Program as potential carcinogens.

According to lead author Rebecca Hoehn, the study found that interior materials release harmful chemicals into the cabin air of cars. This poses a significant public health concern, especially for drivers with longer commutes and child passengers, who breathe more air per pound than adults. The study analyzed 101 electric, gas, and hybrid cars from the U.S. dating from model year 2015 or newer. It noted that car materials release more toxic air in summer due to heat, with cancer-causing compounds detected in car seat foam. The researchers warned that commuters, particularly those with longer drives, are likely to be exposed to flame retardants. Children, who breathe more air per kilogram body weight compared to adults, may also face greater exposures during equivalent commuting times. The study also highlighted that individuals living in warmer climates may experience higher exposure to flame retardants and other semivolatile chemicals used in vehicles. To mitigate concentrations of flame retardants in cabin air, car users are advised to control their vehicle's cabin temperature by parking in a garage or shade instead of full sun.

Reference: Rebecca M. Hoehn, Lydia G. Jahl, Nicholas J. Herkert, Kate Hoffman, Anna Soehl, Miriam L. Diamond, Arlene Blum, and Heather M. Stapleton, Environmental Science & Technology Article ASAP, DOI: 10.1021/acs.est.3c10440