Air pollution particles may reach fetuses in the womb, study finds
New evidence has been found that air pollution can breach a mother's placenta and potentially reach fetuses in the womb, raising the possibility of future health problems. Researchers found that when pregnant women breathe in black carbon pollution -- created by the combustion of fossil fuels, such as in diesel-powered cars or the burning of coal -- harmful particles can make their way from the lungs to the placenta and may reach fetuses directly.