With your permission, a Cheann Comhairle, I propose to take questions 9 and 10 together.
The 38th Annual Report, recently published, of the British Empire Cancer Campaign, which is a document of some 800 pages, contains a short report on a piece of research into "the Fractions of Cigarette Smoke Condensate and their Role in Carcinogenesis of the whole Concentrate" which, apparently, is the basis of the press statements referred to. That brief report does not indicate that smoke content plays a very insignificant part in the inception of lung cancer. On the contrary it tends to confirm the tumour-promoting activity of cigarette smoke condensate as a whole; but work on identifying the fraction or fractions of cigarette smoke responsible for this activity has indicated that one particular constituent of such smoke, benzopyrene, may not, as had been thought, play a significant part in the promotion of tumours by smoking. To state, as some newspapers did, that this means that cigarette smoking has been "cleared" as a cause of lung cancer, was entirely inaccurate.
A wide programme of research is being pursued in other countries in regard to the relationship between air pollution, including pollution from diesel and other fumes, and the incidence of diseases such as lung cancer. Work carried out by the British Medical Research Council would suggest that, while air pollution in general seems to be associated with lung cancer, a causal relationship has not been established and there is no evidence at present that oil fumes constitute a specific health hazard of this kind.