Nothing so common and dangerous as lead and its derivatives, and I do not mean the plúmbeas people, that there are. This heavy metal has already been banned in the manufacture of gasolines, paints, ammunition, toys and other products, and even then lead poisoning continues to occur today as it did in the past. Dr. Alice Hamilton discovered in the early twentieth century that when lead is ingested or inhaled, the body is not able to eliminate it, but accumulates in the bones and other tissues.

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