A groundbreaking study published in Environmental Science and Technology reveals a startling reality: Americans are unwittingly inhaling carcinogenic chemicals within their vehicles. Flame retardants, mandated by the National Highway Traffic Safety Administration since the 1970s, permeate car interiors, posing significant health risks from developmental neurotoxicity to cancer. From traditional polybrominated diphenyl ethers (PBDEs) to alternative brominated flame retardants (BFRs) and organophosphate ester flame retardants (OPEs), these chemicals have seeped into car seats, exposing occupants to potential harm. Profoundly impacting commuters and professional drivers, especially in warmer climates, the study urges preventive measures like increased ventilation and minimizing flame retardant usage in personal vehicles to mitigate health hazards.