I was just going to add that there are groups who meet to determine the criteria for these commodities as they will be hitting the marketplace. They will determine product by product what are the ideal specifications for those.
For instance, coming back to paper, which was an example Margaret used earlier, most of us think that in the world of paper the higher the recycle content the better, and that's what you need to consider. In fact, for paper, if it has chlorine, that's something you'd like to get rid of. And is the fibre from sustainably managed forests, and is there recycled content? This can be quite complicated, and those are considered product group by product group.
In some cases it's a mixture of a lot of things. In the case of printers, for instance, when they're considering the kinds of printers we should be buying, or the kinds of specifications we need to consider for printers, there are certainly some things we could do today to be buying printers that are slightly greener than what we have traditionally purchased. But the real leap forward is in how we manage what comes out of the printers--perhaps having more of the new multi-function devices that consume less energy and better manage your printing.
So there are things you can do in the short term in the commodity, but we're always thinking in the long term about what we can do over the life cycle of the use of that product.