London's ULEZ Expansion Cuts Pollution Across Outer Boroughs

The expansion of London’s Ultra-Low Emission Zone (ULEZ) in August 2023 has led to significant improvements in air quality across the city, with reductions in nitrogen oxides (NOx), PM2.5 particulates, and carbon dioxide (CO2) emissions. Data indicates that 11 boroughs experienced a 15% drop in NOx and a 32% decrease in PM2.5 levels. A report reviewed by independent experts confirms that NOx emissions from road transport are projected to be 36% lower in 2024, equating to a reduction of approximately 3,400 tonnes. Public officials, including Mayor Sadiq Khan, have highlighted the positive health impacts of the ULEZ, despite opposition from some local leaders who initially challenged the expansion. Calls have been made for greater public acknowledgment of the ULEZ's benefits, with advocates urging for a broader cultural shift away from car dependency. Overall, the findings suggest that ULEZ is accelerating improvements in London's air quality more rapidly than expected.