Environmental Research Foundation . . P.O. Box 5036, Annapolis, MD 21403 . .
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To subscribe, E-mail the words . . PCBs are a family of toxic industrial chemicals commercialized in 1929 by Monsanto, and now found in nearly all humans on earth. The children's mental and physical growth have been followed since birth. Those children have been compared to a control group of 71 babies whose mothers had not eaten any Lake Michigan fish. The Jacobsons analyzed PCB levels in the blood of the babies' umbilical cords, thus providing a reliable measure of pre-natal exposure.