Question raised in Lok Sabha on pollution in Metro cities, 21/07/2015
Question raised in Lok Sabha on pollution in Metro cities, 21/07/2015. World Health Organisation (WHO) released Ambient Air Pollution Database-update 2014 considering only two pollutants, namely PM10 (particulate matter having size equal to or less than 10 micron) and PM2.5 (particulate matter having size equal to or less than 2.5 micron) for 1628 cities at global level whereas National Ambient Air Quality Standards (NAAQS)-2009 notified by the Central Government comprise twelve pollutants including PM10 and PM2.5. WHO report describes 10 Indian cities including Delhi among top 20 most polluted cities in world while considering estimated data for fine dust (PM10) while it is 13 cities considering PM2.5 in select manner which is improper.