§ Mr. A. Evansasked the Parliamentary Secretary to the Ministry of Works, as representing the Lord President of the Council, what progress has been made by the Fuel Research Station in testing the concentrated gases caused by motor vehicles in London streets; and if he will make a statement.
§ Mr. BevinsDuring the last twelve months the Fuel Research Station has measured the concentrations of carbon monoxide in the air caused by the exhaust gases of motor vehicles at a number of sites in London. The average concentrations ranged from less than one part of carbon monoxide per million parts of air in the centre of Hyde Park to 27 parts per million above the pavement in Oxford Circus at times of heavy traffic. These concentrations of carbon monoxide are well below the levels which would constitute a danger to health. The investigation of other pollutants in exhaust fumes is being continued.