HC Deb 18 April 1991 vol 189 cc225-6W
Mr. Dalyell

To ask the Secretary of State for the Environment what assessment has been made of the extent to which sulphur dioxide from oil wells after they are lit is less toxic than the hydrogen sulphide produced from the same wells before ignition.

Mr. Baldry

I refer the hon. Member to the answer that I gave him on 15 April 1991 at columns65–66 and to the related documents which have been placed in the Library of the House.

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