Fresno, California
https://en.wikipedia.org/wiki/Fresno,_California
http://www.latimes.com/local/la-me-fresno-pollution-20140424-story.html
http://bazallergy.com/fresno-air-quality/
http://www.latimes.com/local/la-me-fresno-pollution-20140424-story.html
http://bazallergy.com/fresno-air-quality/
Kabwe, Zambia
https://en.wikipedia.org/wiki/Kabwe
http://www.worstpolluted.org/projects_reports/display/45
http://www.blacksmithinstitute.org/projects/display/3
http://www.irinnews.org/news/2006/11/09
http://www.worstpolluted.org/projects_reports/display/45
http://www.blacksmithinstitute.org/projects/display/3
http://www.irinnews.org/news/2006/11/09
Vapi, India
https://en.wikipedia.org/wiki/Vapi
http://www.worstpolluted.org/projects_reports/display/40
http://timesofindia.indiatimes.com/city/surat/Vapi-most-polluted-industrial-cluster-again/articleshow/13320549.cms
http://www.worstpolluted.org/projects_reports/display/40
http://timesofindia.indiatimes.com/city/surat/Vapi-most-polluted-industrial-cluster-again/articleshow/13320549.cms