r/u_sdbernard•8 yr. ago[deleted][OC]NO2 levels mapped in London. Where should you avoid? Anywhere in the City![OC]Posted Aug 21, 2018, 7:23 AM UTC31ShareSave
![[OC]NO2 levels mapped in London. Where should you avoid? Anywhere in the City![OC]](https://i.redd.it/4qf6ewjceeh11.jpg)