I very much welcome the debate brought forward by David Melding, and I think there are lots of really interesting ideas in the paper he presented to his own party's conference. Decarbonisation, I'm very pleased to say, is a key priority of the Welsh Government's economic action plan, so I think there are lots of exciting ideas that we can pick up on in delivering what we absolutely have to do to meet our climate change obligations. We've seen what can be done if we're ambitious, as with the recommissioning of the Wales and the borders rail service, which has many environmental features, including some of the lines being 100 per cent eco, and I think that that is a really important indication of what we can do. I absolutely agree that Cardiff is of an optimum size, and we definitely don't want to see it growing into some sort of ghastly urban sprawl, which is what will happen unless local authorities and the planning Act prevent that happening, because certainly that would be what the developers would like. So, we need to fiercely enforce the green belt around our capital city if we're going to avoid the sort of creeping urban sprawl that would simply eliminate everything that we celebrate about Cardiff.

I would love to make Cardiff the UK's first carbon-neutral city, and I think it's fantastic that David Melding is articulating that ambition. I think that the green routes on at least 50 per cent of commercial developments is definitely something we should be aiming for. The flats that have been built above St David's 2 in the city centre are a good indication of what can be done with proper advance planning, because there are gardens in the sky that the residents of those flats are able to enjoy, even though they're in an area that's obviously completely concrete, as it's the middle of the shopping district. But I think that that's the sort of thing we should be expecting of any other further city centre developments—[Interruption.] Yes.