My Lords, I want to make a couple of quick points and press a couple of questions similar to ones that have already been made. What we are talking about is known in economics as a Pigovian tax. I know this is not a tax but Pigovian taxes are intended to discourage activity. The one thing economists say about them is that they should be as technology-neutral, as transparent and as even as possible, otherwise they simply push down something that pops up somewhere else. I worry that we are talking about dealing with what is a very small part of the amount of plastic litter that ends up in the countryside. The point has been made that there is an awful lot of litter on roadsides, particularly at this time of year, and relatively little of it consists of supermarket plastic bags. I have heard the figure of 1%, although I do not know if that is right. Is it not possible to come up with something much more neutral about plastic technology generally across the board, to see whether we can discourage it without picking on this one bag?
I find it very hard to believe that the savings in littering and CO2
will be in the region of £780 million— I think that was the number I heard. This is only a relatively small part of the litter that is around. I cannot believe that 10 minutes less spent picking up litter on the side of the road because there are no plastic bags there will add up to £780 million. On the CO2 point, I echo what the right reverend Prelate the Bishop of Chester said. It is not at all clear that the alternatives will produce less CO2—unless we all use the equivalent of the right reverend Prelate’s bag and I
am not sure that everybody will. We know that more energy often goes into making paper bags by the time that transport and everything else is taken into account, whether or not, as my noble friend Lord Holmes said, that paper bag gets reused. We also heard from my noble friend Lord Lindsay that oxydegradable plastic bags will have an impact on the recycling chain. Can we make absolutely sure that, when we quote figures for the amount of carbon dioxide that will be saved by this measure, they are honest and properly audited? One hears some claptrap in this area and it would be nice to be sure that the figures are right.
The hypothecation of taxes—that is, when a tax automatically goes to one use rather than just into the Treasury—is something that the Treasury has always resisted. I know that this is not a tax—it is a charge—but none the less it has been hypothecated to certain good causes. On the whole, that is quite a good idea, as long as the customer is allowed to direct where it goes. I hope that that becomes a slightly more general point across government.