It's probably a combination of things, but the correlation to the banning of lead seems to be the highest of any other single reason. http://www.motherjones.co

It's probably a combination of things, but the correlation to the banning of lead seems to be the highest of any other single reason. http://www.motherjones.com/environment/2013/01/lead-crime-link-gasoline http://www.motherjones.com/environment/2013/01/lead-crime-li...