Here's a Mother Jones article discussing the correlation between the rise and fall of leaded gasoline usage and the rise and fall of violent crime during the 20

Here's a Mother Jones article discussing the correlation between the rise and fall of leaded gasoline usage and the rise and fall of violent crime during the 20th century. http://www.motherjones.com/environment/2013/01/lead-crime-link-gasoline http://www.motherjones.com/environment/2013/01/lead-crime-li...