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From my references we know lead is neurotoxic which is one of the worst. Lead has been found in toys from China, paint, and water. Lead is associated not just with brain developmental issues like low IQ but very importantly is associated with violent behavior. When you look at inner cities and you realize a lot of the children grew up in toxic environments with lead paint, lead in the water, lead in the toys, then of course you can understand many will not develop appropriately psychologically. This has an extremely toxic effect on the environment in the form of violent sociopathic behavior, criminal activity, all the stuff America complains about with regard to inner cities.

As environmental quality has gone up the violent crime has gone down dramatically. Lead might not kill people but it makes people kill each other.

Please cite your scientific studies or journal reference.

References

  1. http://www.americanscientist.org/my_amsci/restricted.aspx?act=pdf&id=3020051287496
  2. http://e360.yale.edu/features/from_the_fields_to_inner_city_pesticides_affect_childrens_iq
  3. http://www.chicagotribune.com/news/ct-lead-poisoning-science-met-20150605-story.html
  4. http://www.telegraph.co.uk/news/worldnews/asia/china/8944028/One-third-of-Chinese-toys-contain-heavy-metals.html