About six lakh children are found to develop some kind of intellectual disability every year because of exposure to the heavy metal lead.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/nagpur-joins-who-war-against-lead-poisoning
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-nagpur
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nagpur-d
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lead
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/heavy-metals
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hazardous-products
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/child-health
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/unep
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment