Most of the tomatoes and cucumbers I buy here in Alberta year-round are greenhouse grown in-province. Our electric power here is basically natural gas with a bit of wind and hydro. Although to your point, we're probably one of the cheapest locales in the world for NG.

In southern Ontario where there are many ( the most?) greenhouses electricity is primarily produced by Nuclear (50..55%) Hydro power is about 24 ..38% of the total.

I think the bigger difference is the Canadian attitude about the "commons" nature of electricity and so profiting excessively on power is frowned upon.