Is UK air clean?
Approved answer
Air Quality Regulations in the UK
In the United Kingdom, legislation regarding nitrogen dioxide (NO2) pollution, which is among the most dangerous pollutants, stipulates that the annual average concentration must not exceed 40 µg/m3 (micrograms per cubic meter of air). The most recent data indicates that in 2021, 10 out of the 43 national reporting zones experienced NO2 pollution levels that were deemed illegal.