§ Mr. KirkwoodTo ask the Secretary of State for the Environment if he will publish figures for the comparative level of(a) carbon monoxide and (b) nitrogen oxide in the air in British cities.
§ Mrs. Virginia Bottomley[holding answer 14 March 1989]: The results of air quality monitoring programmes carried out for the Department have been published annually since 1979 in the "Digest of Environmental Protection and Water Statistics" and its complementary "Statistical Bulletins". Copies of these documents are placed in the Library of the House. Results for carbon monoxide were first published in Digest No. 2, 1980, and for nitrogen oxides in Digest No. 3, 1981.