Air pollution in outer London was down on what it will have been with out Ulez, after the zone was prolonged final August.
Source : https://www.bbc.com/news/articles/c87r8gv3lkxo
Expanded Ulez has improved air quality – City Hall
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Air pollution in outer London was down on what it will have been with out Ulez, after the zone was prolonged final August.
Source : https://www.bbc.com/news/articles/c87r8gv3lkxo