Editing Kolkata (section)

=== Environmental issues ===
{{Main|Environmental issues in Kolkata}}
Pollution is a major concern in Kolkata. {{As of|2008}}, [[sulphur dioxide]] and [[nitrogen dioxide]] annual concentration were within the national ambient air quality standards of India, but respirable [[Particulates|suspended particulate matter]] levels were high, and on an increasing trend for five consecutive years, causing smog and haze.<ref name="ambientairquality">{{cite web |author=Central Pollution Control Board |publisher=Ministry of Environment and Forests, Government of India |url=http://cpcb.nic.in/upload/AnnualReports/AnnualReport_37_ANNUAL_REPORT-08-09.pdf |title=Annual report 2008–2009 |page=40 |access-date=2 February 2012 |archive-url=https://web.archive.org/web/20120426072456/http://cpcb.nic.in/upload/AnnualReports/AnnualReport_37_ANNUAL_REPORT-08-09.pdf |archive-date=26 April 2012 }}</ref><ref>{{cite news |url=http://www.telegraphindia.com/1081030/jsp/calcutta/story_10035984.jsp |title=Smog city chokes & grounds: foul air, moist and smoky |newspaper=The Telegraph |location=Kolkata |date=30 October 2008 |access-date=25 April 2011 |archive-url=https://web.archive.org/web/20110604143452/http://www.telegraphindia.com/1081030/jsp/calcutta/story_10035984.jsp |archive-date=4 June 2011 }}</ref> Severe air pollution in the city has caused a rise in pollution-related respiratory ailments, such as lung cancer.<ref name="BBC51707">{{Cite news |last=Bhaumik |first=Subir |title=Oxygen supplies for India police |url=http://news.bbc.co.uk/2/hi/south_asia/6665803.stm |publisher=BBC |date=17 May 2007 |access-date=23 June 2007 |url-status=live |archive-url=https://web.archive.org/web/20070612072737/http://news.bbc.co.uk/2/hi/south_asia/6665803.stm |archive-date=12 June 2007 }}</ref>