As I indicated, there are lots of co-benefits. When we act in the context of air quality, we have side benefits on greenhouse gas emissions and the other way around. When it comes to sulphur and NOx, in Europe--and I think it's very much your experience as well--on both sides of the ocean, we have made tremendous reductions thanks to the technology that we have been developing.
In terms of NOx concentrations and particulate matter concentrations, in urban areas we are not yet there. We have a problem primarily with transport, and that's the common problem between clean air and climate change. We have lots of progress when it comes to the emissions from big industrial installations, but we are neutralizing that progress with a very rapid increase of the emissions coming from our transportation system. I can give you figures that for industrial installations since 1990, we are reducing our emissions between 10% and 25% in the power sector and the industrial sector, according to which subsector we are talking about, but we are increasing our emissions from transport by 33% over the same period. So transport is what we have to look at for the traditional local air pollutants, but equally so for reduction of greenhouse gas emissions--hence our regulations on cars and on fuel--because it is private transport, the mobility problems we have in urban centres, that are at the core of the problem on climate change as much as on traditional air quality.