§ 52. Mr. Masonasked the Prime Minister if all the nuclear tests due to take place on Christmas Island are to be of the clean bomb type and therefore not adding any more strontium 90 to that already existing in the atmosphere.
§ The Prime MinisterOur tests will not make more than a negligible addition to strontium 90 in the atmosphere; but I am not prepared to disclose the nature of the weapons we shall test.