Nitrogen Dioxide in the UK - Chapter 2

● Emissions of NOx have fallen by 37% from 1990 to 2000. This has been mainly due to reductions in emissions from road transport and public power generation. ● Road transport is the largest source of NOx emissions in the UK, contributing 49% of total emissions in 2000. However, emissions from road transport have fallen by 34% between 1990 and 2000 due to improvements in engine design and fitting of three-way catalysts to petrol cars driven by increasingly tighter European vehicle emission standards. ● The contribution of road transport to NOx emissions in urban areas is generally higher than the national average. In London, 68% of NOx emissions come from road transport. ● Total UK NOx emissions are projected to fall by a further 25% from 2000 levels by 2010. This is largely driven by a continuing decline in emissions from road transport as vehicles meeting tighter emission standards penetrate the UK fleet. ● Emissions of NOx from road transport in London are predicted to decline by 53% from 1999 levels by 2010. This compares with a predicted decline of 49% in emissions from total urban UK road transport emissions over the same period. Little, if any, decline is expected in emissions from other sources in London. 0 50