§ 19. Mr. Eadieasked the Minister of Public Building and Works what percentage of the 40 per cent. of fly-ash used by the construction industry comes from Scotland; and what areas it comes from.
§ Mr. John SilkinAbout 10 per cent. It is produced in Ayrshire, Renfrewshire, Kincardineshire, Fife and Edinburgh.
§ Mr. EadieIs my right hon. Friend aware that the miners believe that not enough publicity is given to what could 393 be described as derivatives coming from coal-fired stations and that his statement today will certainly be welcomed by them?
§ Mr. SilkinI am grateful to my hon. Friend, and I congratulate him on the vigour with which he has pursued this subject.
§ Sir R. RussellCan the Minister tell us what fly-ash is?
§ Mr. SilkinFly-ash—P.F.A.—is produced by the electricity generating stations using ground coal blown on to the boilers, which produces a powdered ash.