§ Mr. Skeetasked the Secretary of State for the Environment what tonnage of limestone is required for road construction and for building; and if he will give annual figures over the past decade.
§ Mr. Giles ShawThe available information is as follows:
Production of Limestone for Constructional Purposes: Great Britain Million Tonnes Year Road-stone Concrete Aggregate and fill Building stone and railway ballast Manufacture of building materials (incl. cement) All constructional uses 1973* 45.0 32.0 1.0 13.0 91.0 1974 41.2 30.3 1.3 12.6* 85.4* 1975 35.8 30.2 1.7 12.3 79.9 1976 31.5 27.6 1.8 12.2 73.0 1977 30.7 27.5 1.5 11.5 71.1 1978 31.5 28.7 1.4 12.3 74.0 1979† 35.1 28.5 1.2 11.8 76.6 * Estimated. † Extractors' sales. The proportion of limestone used as concrete aggregate and "fill" going into road construction is not known, but is thought to be at least half.