Mr. Derek Moran:

What we present, Deputy, is a set of macroeconomic risks. Let us look at how we feed into the issue of mitigation. In 2008 we changed the vehicle registration tax to base it on carbon emissions rather than engine capacity as expressed in cubic centimetres. This was a mitigation factor to try to improve quality. That raises other issues as we go on. Other gases become important and that raises policy challenges in itself. In 2010 we introduced a carbon tax, initially on oil fuels, but now on solid fuels as well. The plastic bag levy is another example. We have had many policy inputs on this matter.