| Topic: | Re:Re:Re:Air pollution in Putney | |
| Posted by: | Susie Morrow | |
| Date/Time: | 20/02/14 13:52:00 |
| Aircraft are largely irrelevant to air pollution in Putney, hence the pressing need to focus on local sources. See recently published TfL Health Action Plan, 'Improving the health of Londoners', download at http://www.tfl.gov.uk/assets/downloads/businessandpartners/improving-the-health-of-londoners-transport-action-plan.pdf which includes some relevant info: "The pollutants The main air pollutants of interest in London are small particles (PM10 and PM2.5) and nitrogen oxides (NOx). Small particles Small particles are defined by their diameter and often grouped as being below 10 micrometres in diameter or below 2.5 micrometres in diameter [50]. Sixty per cent of small particles come from road transport, 45 per cent come from tyre and brake wear and 15 per cent from exhaust emissions [51]. The EU sets standards for small particles (PM10) emissions. These are called ‘limit values’. There has been significant progress to date and these standards are now widely met in London (figure 11). But PM2.5 in London is still associated with around 4,000 ‘deaths brought forward’ and there is no safe level for this pollutant, so further reductions are needed. NOx Sixty-three per cent of NOx are believed to come from ‘ground-based transport’ which is mostly road transport (figure 12) [52]. Nitrogen dioxide concentrations (arising from NOx emissions) still widely exceed EU limit values on roads in inner and central London. This is similar to other large, densely-built conurbations in Europe (figure 13)." |