I would think, Mr. Chair, through you to the member, that my colleagues here, who have been dealing with this for quite a long time, would be able to answer that. I think we're still working through whether you need to start from scratch or whether you can retrofit. Frankly, we're going to have to retrofit because only 3% of the building stock changes every year, so we still have 97% to deal with.
And there are lots of good examples of communities where that retrofitting is taking place, and others that we have documented across the country, where new lands, old brownfield sites, are being redeveloped. There's one in Montreal, the Technopôle Angus Montréal, which is a very large--one million square feet--space that's being built. It's going to LEED buildings. It's close to the transit system, and it is using a lot of what we're talking about. So I think it's a combination of doing both.
I'll give you another example. In British Columbia, I'm working with four high-growth communities, four high-growth municipalities—Surrey, Langley, Abbotsford, and Coquitlam—which are going to receive two-thirds of the next million people moving to Vancouver. They have dramatically changed their land use to much more compact, higher-density, green buildings, and they want transit to be built into these old city centres of Whalley and other places to shape that development. We are now starting the dialogue with them about integrating energy into that.
Calgary has, in its east downtown lands, the old rail yards. It had to go through some very difficult bureaucratic and regulatory regimes to get in sync with the new mixed-use, very high-density development--it's an attractive development--of this old rail yard site, that finally has a district energy system integrated into it.
So I think this is still an emerging approach. As to whether you need to have a new development or retrofit existing land use and buildings, I think this is something we need to act on, as we do on these demonstration projects throughout the country.