Massive hydro electricity in Quebec

It's primarily because of Canada's immense supply of hydropower and their high tech manufacturing processes. Note: "Canada does not mine bauxite domestically, relying instead on imported bauxite to support its aluminum production." https://natural-resources.canada.ca/minerals-mining/mining-data-statistics-analysis/minerals-metals-facts/aluminum-facts#a4

Aluminum and steel are energy intensive industries. Canada especially Quebec has cheap electricity (hydro and nuclear) which makes production cost cheaper. Secondly, Canada has availability of raw materials needed to produce aluminum and steel so that also reduces input costs.

We have cheap and abundant hydroelectric power from waterfalls