I want to address the comments on both the longevity and the risk.
The biggest investment in most of a district energy system is the pipe in the ground. Again, I wanted to stress in my presentation that it's the backbone. It's the biggest capital cost, and it is really the thing that enables. The technology can change, and so there is some longevity to the heat pumps. There may be some technology breakthrough that will make energy even cheaper than using a little bit of electricity to extract the heat out of the sewer system. You see that in Scandinavia. They had made a major investment into ground source heat pumps. Electricity got so expensive that they've moved now to more of a biomass type of technology.
So as far as longevity goes, yes, the systems can last a long time, but the biggest investment is the pipe. It will last a long time, and it doesn't need to change. I think that's a really important point for us to make.