Renewables can play a very significant role in an electricity system. It's attractive because it is low cost, and there's been record global investment in renewables. There are many jurisdictions globally that operate with a very significant share of variable renewables in their system, but it needs to be a well-crafted system, and that system is going to have to operate with a number of other features to it for the system to work.
That is going to include things like storage, optimized interconnections, demand-side response, smart grids and a market structure that brings that all together. I think it's not a simple, single thing; it takes a well-crafted market structure.
I think that Alberta is making changes to its system that are going to bring that well-crafted structure to fruition in the months and years ahead.