I'll start, and maybe my colleague can add to this.
I don't know that there's a challenge. We've been building environmentally sustainable products for a number of years across a number of our commodities at the federal level. I mentioned in my opening remarks that there are about 35 commodities, and within that there are a number of subgroups of commodities. Many of those embed environmental criteria, such as energy requirements and so on.
We can do a lot more, and we are pursuing those initiatives; there's no doubt about it. We need to continue working with the industry to stimulate innovation, and we do that right now through our build in Canada innovation program, which is about a $40-million program annually that we manage at PSPC.
We invest in clean technologies so some very interesting and innovative technologies are being developed that will have a direct benefit in the types of things we procure for federal client departments.