Air pollution in London is two to three times World Health Organisation (WHO) recommended levels in some of the busiest streets and resulted in the deaths of over 1,000 people in 2005 (which is more than four times the number that died from road traffic accidents).
For far too long, air pollution policy has failed to tackle air quality holistically (or fast enough). For example, some of the measures introduced to reduce particulate matter (PM2.5 and PM10) emissions from diesel engines (which have still not resulted in European Union (EU) legal limits for 2005 being met) have exacerbated the nitrogen dioxide (NO2) air pollution problem to the extent that Transport for London estimates that 1,370,000 people in London in 2008 will be exposed to unhealthy levels of nitrogen dioxide unless urgent further action is taken.
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