§ Mr. Sutcliffeasked the Secretary of State for the Environment what steps he proposes, including the seeking of international agreement, to limit the emission of sulphur dioxide into the atmosphere by industrial and domestic sources.
§ Mr. Peter WalkerBy far the most sulphur dioxide in urban areas comes from local low-level emissions and about 50 per cent. of this is attributable to dwelling-houses. During the past 10 years, average concentrations have fallen by one-third; diminution of sulphur dioxide is one benefit of smoke control, to which I am giving every encouragement. Internationally, we are participating in research being carried out by the Organisation for Economic Co-operation and Development.