Campaigning to achieve urgently and sustainably full compliance with World Health Organisation guidelines for air quality throughout London and elsewhere http://cleanair.london/ *RECORD MORNING HIGH* #PollutionCheck http://t.co/MmQOAEHoF2 | 465.1m particles per m3 > 0.3 microns. Time 0720 pic.twitter.com/1vzvpFUVdy — Clean Air in London (@CleanAirLondon) March 17, 2015