§ Mr. Adleyasked the Secretary of State for Trade and Industry whether tests of environmental pollution of the upper atmosphere have been conducted by Her Majesty's Government, on military or civil supersonic flights; and what results have been obtained.
§ Mr. Adleyasked the Secretary of State for Trade and Industry what scientific evidence he has from international sources that supersonic flight causes environmental pollution not caused by subsonic jet flight.
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§ Mr. NobleNo firm scientific evidence is yet available of the effects of supersonic flight on environmental pollution. Work, to which the United Kingdom is contributing, is, however, being carried out on this subject by the World Meteorological Organisation.