Sadiq Khan has hailed what he said was remarkable progress in improving London's air quality under his tenure as mayor, after a study showed roadside pollutant levels falling faster in the city than elsewhere in the UK.
According to the research, roadside levels of NO2 pollutants fell by 49% between 2016 and 2023, and were lower last year even than in 2020, when there were extended periods of lockdown during the Covid pandemic.
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