Infants who were exposed to high levels of PAHs in the womb face a significant risk of delayed cognitive development in childhood.These results appear in Environmental Health Perspectives(doi 10.1289/ehp.9084).PAHs are byproducts of burning fossil fuels,tobacco,and even garbage.Researchers examined 183 3-year-old children of nonsmoking Dominican and African-American women living in inner-city neighborhoods in New York.
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