Karachi is the largest city of Pakistan and a hub of industrial activity.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/chemical-inflows-poisoning-karachi-coastal-waters
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-times-pakistan
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pakistan
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industrial-waste
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hazardous-waste
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ecosystems
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-ecosystems
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fisheries
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mangroves
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forests
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment