Ambient (outdoor) air pollution in cities (pm2.5)

<span style='color: rgb(77, 77, 77); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-family: Calibri, sans-serif; font-size: 16px; line-height: 18.4px; background-color: rgb(255, 255, 255);'>The map shows ambient (outdoor) air pollution monitoring from almost 1600 cities in 91 countries. This 2014 update of the Ambient Air Pollution (AAP) consists mainly of urban air quality data – annual mean concentration of fine particulate matter of less than 2.5 microns of diameter (PM2.5) [ug/m3], for the years 2008 2013. </span><br /><span style='color: rgb(77, 77, 77); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-family: Calibri, sans-serif; font-size: 16px; line-height: 18.4px; background-color: rgb(255, 255, 255);'>The primary sources of data include publicly available national/subnational reports and web sites, regional networks such as the Asian Clean Air Initiative and the European Airbase, and selected publications. The data aims to be representative for human exposure, and therefore primarily captures measurements from monitoring stations located in urban background, residential, commercial and mixed areas.</span>