Externalities

Dramatic fall in London’s levels of deadly pollutants after Ulez expansion

A Greater London Authority report finds London’s air pollution has fallen markedly since the Ultra Low Emission Zone (ULEZ) was expanded to all boroughs in August 2023. Roadside NO2 is down 27% across London since 2019, PM2.5 in outer London is 31% lower than without the 2023 expansion, 99% of monitoring sites show improvement, and 97% of vehicles are now compliant, with notable benefits in deprived areas and reductions in CO2.