There has also been a large drop in violent crime and teen pregnancies at about the same time which followed the peak and subsequent decline in lea in gasoline.

There has also been a large drop in violent crime and teen pregnancies at about the same time which followed the peak and subsequent decline in lea in gasoline. The crime decline lagged the lead decline by 20 years mol, which would be the delay for exposed babies to reach adulthood. http://www.motherjones.com/environment/2013/01/lead-crime-link-gasoline http://www.motherjones.com/environment/2013/01/lead-crime-li... Maybe the decrease in rapes was caused by a decrease in lead rather than an increase in porn. But I can be convinced that free porn for perverts is a good thing.