Building constructions, unpaved roads, and emissions from motor vehicles have made pollution worse in Metro Manila.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/metro-manila-pollution-close-standard-level-%E2%80%93-denr
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/manila-bulletin-philippines
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/philippines
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industrial-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects