To ask the Secretary of State for the Environment if he will give the location of sites where landfill gases have been identified as a potential problem.

[holding answer 15 January 1990]: Reliable and complete information on sites where landfill gas has been identified as a potential problem is not held centrally. Waste disposal authorities can advise about specific sites in their area.

To ask the Secretary of State for the Environment if he will give details of the sites, where landfill gases are a potential problem, that are located within 250m of housing.

[holding answer 15 January 1990]: This information is not held centrally. Waste disposal authorities provide information to local planning authorities where development is proposed within 250m of a landfill site.