38. Dr. Jegerasked the Minister of Housing and Local Government what gaseous elements in fog, besides sulphur dioxide, for example, nitric oxide, are analysed as a matter of routine in London.
§ The Minister of Housing and Local Government (Mr. Harold Macmillan)Sulphur gases are measured at a number of London stations as a matter of routine; other gaseous elements are, in comparison, very small, and to measure them would be difficult and expensive.