Study raises concern over exposure to flame retardant chemicals used in some car seats

Two years ago, Veena Singla of San Francisco volunteered to participate in a study researching drivers' exposure to flame retardants used on car seats. 

Singla drives a hybrid car to help the environment, but hadn't thought much about the air inside her vehicle. But according to a study published Tuesday in the journal Environmental Science & Technology, "vehicles are likely important sources of human exposure to potentially harmful [flame retardants]."

Those most likely to be exposed are commuters, full-time vehicle drivers and children. According to the study, children are at greater risk than adults even for equivalent commuting times.