Norsk Hydro is an aluminum and renewable energy company. It operates through five segments: Hydro Bauxite and Alumina, Hydro Aluminium Metal, Hydro Extrusions, Hydro Energy, and Hydro Metal Markets. The Hydro Bauxite and Alumina segment comprises bauxite mining activities, production, and sale of alumina. The Hydro Aluminium Metal segment focuses on aluminum production and casting activities. The Hydro Extrusions segment offers products within extrusion profiles, building systems, and precision tubing. The Hydro Energy segment includes operating and commercial responsibility for power stations, trading and wholesale business, and energy sourcing. The Hydro Metal Markets segment specializes in sales activities relating to products from metal plants.