§ 83. Dr. Stross
asked the Parliamentary Secretary to the Ministry of Works, as representing the Lord President of the Council, what research is being conducted 12W on the problem of the increasing radioactive content of the atmosphere of London; and what evidence he has regarding the association between this increased radioactivity and bronchial disease.
§ Mr. Bevins
There is no evidence that there has been, during recent years, any significant increase in the radioactivity of the atmosphere, which remains mainly due to natural causes. Nor has there so far been any evidence that radioactivity is a contributory factor in the causation of bronchial cancer but investigations are continuing into this possibility. Measurements of atmospheric radioactivity under different conditions are being undertaken at London and in other centres.