Data relating to populations and population weighted annual mean PM2.5 (ug/m3) by Ward and estimated attributable deaths (rounded to whole numbers) each year based on 2008 rates at concentration coefficients of 6%, 1% and 12% per 10 ug/m3 of PM2.5.Note that the 6% co efficient factor is considered the 'best estimate' by the Committee on the Medical Effects of Air Pollutants (COMEAP).Commissioned to inform the Mayor's Air Quality Strategy, will be updated as appropriate.Based on 2008 population ratesClick here for the Clearing London's air webpage.