There is a lot to be said as well for the increase in water quality. Lots of people used to have a minor or severe case of lead poisoning. In addition to looki

There is a lot to be said as well for the increase in water quality. Lots of people used to have a minor or severe case of lead poisoning. In addition to looking a bit like retardation, it also happens to cause poor impulse control, making complex tasks considerably harder. http://www.wired.com/wiredscience/2011/06/the-crime-of-lead-exposure/ http://www.wired.com/wiredscience/2011/06/the-crime-of-lead-...