Lead Exposure May Have Lowered The IQ of Half of Americans Since 1940
Childhood lead exposure in the United States is ubiquitous and much more concerning than previous estimates have suggested, according to a new study. When researchers analyzed leaded gas use from 1940 and combined it with data on blood-lead levels from the mid 1970s, they found more than 54 percent of Americans alive in 2015 had … Read more