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Almost 100 years in the past, america solved a serious public well being disaster, goiter, by iodizing salt. Surprisingly, it additionally led to a 15-point bounce in IQ. What can this inform us as we speak about how we should always reply to poisonous substances like lead?
This story was initially printed by Grist with the headline How the U.S. by accident raised the IQ of a whole technology on Nov 7, 2019.