I, too, would like to add my support for the plastics tax, and perhaps some of it could be used to invest in water fountains so people would be able to fill up with water rather than having to buy yet another water bottle. Also, I think it’s perfectly right, in response to Neil Hamilton, that we should impose a tax on those who choose to adulterate our food with sugar, salt and fat in order to pay for the health consequences and the costs of looking after them. Why should we put up with fast-food packaging littering our landscape and expect someone else to pick it up? A takeaway packaging tax could be given to local authorities to pay for the extra road sweeping required.

But I want to use most of my time to discuss the idea of a modest carbon tax. We simply aren’t grasping the nettle of change required to avert the environmental disaster that experts warn will be with us within 15 years, never mind that of our children and grandchildren, unless we change radically. The climate change committee last week exposed Wales as an outlier in efforts to reduce carbon emissions. So, this is a proposal that I think encourages wealth creation, as well as tackling the scandal of air pollution, which DEFRA admits is killing a population the size of Maesteg every year in the UK. Levels of nitrogen dioxide emitted mostly by diesel vehicles are above legal limits in nearly 90 per cent of urban areas.