Almost all coal plants in Alberta have been shut down and it's a small minority of net generation now. Natural gas has taken up most of the slack, but there's actually quite a lot of solar and wind generation in Alberta considering the politics (though that's likely to slow down now).
Ah i didn't realize the coal plants were retired! That's good to see. I was looking at the carbon impact per kwh in Alberta earlier in the year for a project I was working on, and was surprised how high it was. I guess other areas of the country just have a lot of other sources diluting the impact.
http://ets.aeso.ca/ets_web/ip/Market/Reports/CSDReportServle...