§ Mr. Barry JonesTo ask the Secretary of State for Wales what estimate he has of the scale of pollution in Wales from road vehicle emissions of(a) carbon monoxide, (b) hydrocarbons, and (c) nitrogen oxides; and if he will make a statement.
§ Mr. Wyn RobertsInformation about emissions from road vehicles is not held in this form but total United484W Kingdom figures are published annually in the Department of the Environment's "Digest of Environmental Protection and Water Statistics".
Nitrogen dioxide figures can be taken as an adequate indicator of the level of road vehicle pollution. A United Kingdom wide survey of Nitrogen dioxide made for the Department of the Environment by Warren Spring laboratory in 1986 showed levels in Welsh cities to be generally below the average for the United Kingdom.