§ 60. Mr. Michael
To ask the Secretary of State for the Environment what assessment he has made of the impact of different fuel brands and of petrol, lead-free petrol and diesel, respectively, on the environment.
§ Mr. Heathcoat-Amory
The composition of motor fuels sold in the United Kingdom is controlled and no assessment is made of the environmental effects of different brands. The reduction in lead content of petrol in 1986 and the growth in sales of unleaded petrol have more than halved the concentration of lead in the air. However, it is now estimated that some 80 per cent. of lead in air still comes from petrol vehicle emissions. Diesel fuel has no lead added to it.
The impacts on the environment of other materials emitted from vehicles are given in the report of the Department's terrestrial effects review group, acid rain review group, and building effects review group. The proportions of total emissions of these materials which come from diesel and petrol vehicles are given in the Digest of Environmental Protection and Water Statistics. Copies of review group reports and the digest are in the Library of the House.