There is a credible theory that the use of leaded fuel was responsible for the spike in violent crime that occurred in the same period. https://en.wikipedia.or

There is a credible theory that the use of leaded fuel was responsible for the spike in violent crime that occurred in the same period. https://en.wikipedia.org/wiki/Lead%E2%80%93crime_hypothesis https://en.wikipedia.org/wiki/Lead%E2%80%93crime_hypothesis