---

Dept for Transport

Answer

Gregory Barker: To ask the Secretary of State for Transport how many tonnes of (a) fine particulates and (b) ultrafine particulates were emitted into the atmosphere in the UK by the (i) diesel powered vehicle parc, (ii) petrol powered vehicle parc and (iii) road fuel gas vehicle parc in the latest year for which figures are available. [133705] Mr. McNulty: The following table, based on data from the National Atmospheric Emissions Inventory, presents emissions of particulate matter by fraction, in kilotonnes, from road transport in 2001. Emissions of particulate matter by fraction (kilotonne) _________________________________________________________________________________________________. Vehicle type Particulate fraction Diesel Petrol Road fuel gas Coarse PM10 26.9 3.17 0.02 Fine PM2.5 25.94 3.06 0.02 Ultrafine PM0.1 13.42 1.58 0.01 Vehicle kilometres 135.4 354.8 1.7 covered (billion) _________________________________________________________________________________________________. PM10 includes all particles with an aerodynamic diameter of less than 10m (likewise PM2.5 includes all particles smaller than 2.5m, and so on), thus the finer particle totals are a subset of the coarser particles. Figures for PM2.5, PM1 and PM0.1 are estimated from those for PM10 and the mass fractions in these size ranges available for different emission sources and fuel types. These figures assume the following: 100,000 LPG vehicles in parc, travelling the same distance per year as passenger cars (industry source); emissions from LPG vehicles assumed to be same as average PM factor for petrol vehicles (no PM emissions data available for LPG vehicles); and 850 HDVs running on CNG (industry source), their emissions of PM being 90 per cent. lower than a Euro II HDV running on diesel.

Secondary information

Type

Written question

Reference

133705; 411 c568-9W;411 c572-3W

Session

2002-03

Subjects

Air pollution Exhaust emissions Motor vehicles Petrol Liquefied petroleum gas Alternative fuels Diesel

Contains statistics

Yes

Link

View this Written question on www.publications.parliament.uk