I'd be happy to offer commentary on that. I think this question of regionalized versus localized is a key question. The regional electricity corporation and strategic infrastructure dialogue and studies that I spoke about are focused on looking at that regional picture. But they are modelling in, as well, the contribution that more localized forms of electricity supply could provide.
Our sense is that ultimately, based on cost, efficiency, and driving most rapidly to GHG emission reductions, a combination of both those interconnections and localized, smaller-scale electricity production will form part of the equation.
In terms of the minimum ratio of dispatchable to variable, that really is contingent on how well connected your supply is. You can imagine a system in one area of southern Alberta where the wind blows very strong and there is a superb wind resource, but when the wind is not blowing there, that resource is not there, so that can be a weakness. When that resource is connected to other places that can balance that wind resource—so say the wind is blowing stronger in the middle of the U.S. Midwest at that point—if you can get a broader area interconnected, you can balance to have a higher portion of variable renewables in your overall mix. Part of the rationale for strategic interconnections is that they allow you to achieve more of that balancing of resources across a greater geography.