Mr. Edward M. Taylorasked the Minister of Transport what information she has about the effect on atmospheric conditions in cities, of the change over from trolleybuses to diesel buses in the field of municipal transport; and if she will make a statement.
§ Mr. SwinglerInformation about atmospheric conditions in cities has for some years been collected by the Air Pollution Unit of the Medical Research Council, and no evidence has been found to suggest that diesel exhaust gases cause danger to public health.