For generations of Americans, exposure to lead from car exhaust may have contributed to increased rates of depression, anxiety, inattention, and hyperactivity. Researchers analyzed child blood samples from 1940 to 2015 and historical estimates of lead exposure to determine its impact on early development.
The study found that leaded gasoline, banned in 1996, was responsible for 151 million psychiatric disorders, including ADHD, anxiety, and depression. Those born between 1965 and 1980 showed the highest rates of symptoms. The use of leaded gas peaked in the 1960s and ’70s before being phased out due to its damage to catalytic converters.
The study’s findings may be particularly concerning for Generation X, who were exposed to high levels of lead during their childhood. Co-author Aaron Reuben notes that this generation “tends to think of themselves as ‘generation lead.'” The research adds evidence that removing lead from the environment has numerous benefits and may help alleviate mental health issues.
Previous studies by Reuben found that half of Americans alive in 2015 were likely exposed to damaging levels of lead during childhood, resulting in a loss of 824 million IQ points. The study’s authors hope that their work will inform efforts to reduce lead exposure and promote better environmental health.
Source: https://www.newser.com/story/360651/151m-psychiatric-disorders-tied-to-leaded-gas.html