Environmental Research Foundation . . P.O. Box 5036, Annapolis, MD 21403 . .
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To subscribe, E-mail the words . . The story of PCBs is a morality play for our time. As gasoline was extracted from crude oil, great quantities of other chemicals, like benzene, were left over. Chemists started playing around with these chemicals, to see if something useful could be made from smelly by-products, like benzene. If you heat benzene under the right conditions, you can glue two benzene rings together, creating diphenyl.