Well, there'd have to be a scientific basis for doing that—as to why 500m would have a beneficial effect. But what I can say, of course, is that incineration and co-incineration are subject to the stringent protective requirements of the industrial emissions directive. They've been incorporated into Welsh legislation for a number of years and they include requirements that there should be strict emissions limits for potentially polluting substances; there are monitoring requirements and operating conditions that are applied through environmental permits issued by the environmental regulator. I can also say that, if there are adverse impacts, of course, on amenity or the environment, and they cannot be mitigated, then planning permission, of course, can be refused on those grounds.