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== Pranala luar ==
* [http://www.urbanairquality.org/ International Conference on Urban Air Quality] {{Webarchive|url=https://web.archive.org/web/20081216144156/http://www.urbanairquality.org/ |date=2008-12-16 }}.
* [http://www.unep.org/urban%5Fenvironment/ UNEP Urban Issues] {{Webarchive|url=https://web.archive.org/web/20100329182347/http://www.unep.org/urban%5Fenvironment/ |date=2010-03-29 }}
* [http://ec.europa.eu/environment/air/index.htm European Commission > Environment > Policies > Air >Air Quality].
* [http://www.unep.org/pcfv/ UNEP Partnership for Clean Fuels and Vehicles] {{Webarchive|url=https://web.archive.org/web/20100425051159/http://www.unep.org/pcfv/ |date=2010-04-25 }}
* [http://www.who.int/phe/health_topics/outdoorair/databases/en/index.html Database: outdoor air pollution in cities] from the [[World Health Organisation]]
* [http://www.npr.org/2011/11/07/142089991/poisoned-places-air-pollution-in-your-town Interactive map of US facilities emitting air pollution]