I'll start the response by saying that the cheapest electron is the one you don't need to use. In terms of return on investment, energy efficiency measures are typically the cheapest way of getting clean electricity in that sense.
After that, it really varies by setting. The technology that might be the cheapest or the best investment in Nova Scotia is going to be different from, perhaps, one in British Columbia.
I don't know if you want to add anything, Debbie.