Air pollution in London compared to other cities

Meeting: 
MQT on 2014-09-17
Session date: 
September 17, 2014
Reference: 
2014/3106
Question By: 
Stephen Knight
Organisation: 
Liberal Democrats
Asked Of: 
The Mayor
Category: 

Question

Further to your answer to MQ2014/2634 - in which you stated that "average NO2 levels across monitoring sites near busy roads in Stuttgart, Paris, Munich, Rome and Milan are all higher than those recorded for London. Mexico City's levels are nearly double those of London, and Hong Kong, Istanbul, Beijing and Shanghai all have higher average readings as well" - can you confirm whether you were referring to hourly maximum nitrogen dioxide (NO2) values for these cities, or annual average values? Please provide the source of the data that you used to indicate that NO2 concentrations are worse elsewhere.

Answer

Answer for Air pollution in London compared to other cities