A class of flame retardants known as polybrominated diphenyl ethers (PBDEs) have been phased out of production in the U.S. out of concern for their potential neurotoxic effects, particularly in young children. But the compounds persist in older furniture, plastics and textiles, and in dust. Now a new report in the ACS journal Environmental Science & Technology examines the factors that help predict which children could be at a higher risk for exposure to these compounds.