I will let Tim give you more specs on this, but we have teams of architects and engineers within Public Works who advise us on all sorts of infrastructure projects that we undertake for clients on the Hill. A good example is the restoration of the library. I would invite all of you to go and visit the library. You all had the good fortune of seeing it beforehand; I didn't. I have only seen the restoration work, but it's amazing, and I've seen pictures of what it looked like in the past.
They use whatever products they believe are appropriate in the context of those renovation undertakings. In terms of the greening aspect, whether we own a building or we are a large lessee, if the building will undergo a significant retrofit, we are always involved in the background--obviously as an owner, but even as a lessee--just to make sure it's done in accordance with our standards.
With respect to this particular material, I don't know if Tim wants to comment.