RT: It was brilliant to be part of this very special day.
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London’s biggest ever #CarFreeDay was a great chance to reimagine London with fewer cars – and cleaner air. An air quality monitor on Regent Street recorded a 60% drop in pollution compared to the day before. #LetLondonBreathe https://t.co/0IFYvfIAy2
— Mayor of London (@MayorofLondon) September 27, 2019