HC Deb 14 July 1964 vol 698 cc194-5W
34. Mr. John Hall

asked the Minister of Housing and Local Government and Minister for Welsh Affairs what action he is proposing to take following the last annual report of the Warren Spring Laboratory which drew attention to the fact that whilst the emission of smoke in the air has dropped 60 per cent. that of sulphur dioxide has risen by 32 per cent.

Mr. Corfield

Although the amount of sulphur dioxide emitted in London during the past 10 years has increased by 32 per cent., there has been no detectable increase in the ground level concentration. This is because most of the increased emission is dispersed from high chimneys. My right hon. Friend will therefore maintain his policy of requiring new furnaces at power stations and other industrial premises to be fitted with high chimneys.