Well, you can imagine with the thousands and thousands of real estate property assets that we have, for us to undertake a retrofit of all of them would be extremely costly. What we are doing for new buildings is simple: the rule is that you have to meet the LEED standards. In other buildings, when we are considering a significant investment in the building--as a maintenance, a retrofit--we will insist on the LEED standard.
It's not just a question of the LEED standard. In terms of greening government, we've also looked at our supply chain. As I've said before when I've appeared before this committee, we're trying to green the supply chain. We are slowly but surely getting there, making sure that people provide us with more green products.
As time goes on, we are getting better results from the supply chain. But they also need to adjust, and we're working with them to make sure they understand that for us, at one point, this actually will be a criterion.