amsterdam
berlin
beijing
copenhagen
delhi
houston
istanbul
london
los angeles
moscow
mumbai
munich
new york
paris
prague
seoul
sydney
tokyo
toronto
vancouver
vienna
warsaw
Data from AQICN.ORG
and the World Air Quality Index Project
amsterdam
berlin
beijing
copenhagen
delhi
houston
istanbul
london
los angeles
moscow
mumbai
munich
new york
paris
prague
seoul
sydney
tokyo
toronto
vancouver
vienna
warsaw