I congratulate the hon. Gentleman on securing this debate. In my constituency there is a landfill site—which I call a dump—that deals with about 60% of all waste in Northern Ireland. Even after such sites are closed off, if the gase is not flares off, methane leaks into the atmosphere and still causes a problem years after. We have no way of policing this. Minimum standards are employed by our Environment Agency, but we need to go way beyond that. We need to set higher standards and enforce them, so that operators abide by them. We do not currently see best practice.