My right hon. Friend is obviously in good form this morning, as has been demonstrated by that question and by the sedentary comments that his suggestion has received. Since 1997, there have been significant reductions in road transport emissions-including of particulate matter 10 by 42 per cent., of oxides of nitrogen, NOx, by 48 per cent., and of sulphur dioxide, SO2, by 91 per cent.-in spite of traffic increasing by 13 per cent. The Mayor of London is due to publish the findings of a public consultation on a draft air quality strategy for London today, and we look forward to seeing what he recommends.
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