Sure. In procurement, what we focused on is the biggest areas of impact, for example, buildings, construction, and then fleet and energy.
Buildings are a good example. You take a life-cycle assessment of the building. What is the cost to build it? What is the cost to operate it? What's the cost of disposal or the full life-cycle cost? What are the environmental impacts throughout that? The commitment is to have net-zero carbon ready buildings, and low carbon for retrofits.
PSPC is a good example in that assessment. When they come forward to build or retrofit a building, they're looking at various options for what they can do and what the cost equation is for getting it to lower carbon. You determine what's cost neutral. What are all of cost-neutral things you can do to lower its carbon footprint, and what things might cost you a little bit more in capital, but make you money over the 30 or 40 year life-cycle of the building?
Buildings are a really good example of where we're first applying these principles, and we're pushing this because it is the biggest area that we buy.