Transforming alumina powder into a versatile and malleable metal is a complex and energy-intensive process. That is why we make most of our aluminium based on hydropower. Hydropower provides renewable energy and is a sustainable way to produce the electricity needed for making aluminium. About two-thirds of the energy used in our primary aluminium production comes from renewable sources.
What are the CO2 emissions of aluminium based on the energy source used to create the metal?
Three different raw materials are needed to produce aluminium from alumina: electricity, carbon and an electrolyte (cryolite). Electricity runs between a cathode and a anode, both made of carbon. The anode reacts with the oxygen in the alumina and forms CO2. The result is liquid aluminium, which can now be tapped from the cells.
The greenest aluminium in the world
At one of our sites on the Norwegian west coast we are working on a new technology that will make aluminium production greener. Hydro’s technology pilot at Karmøy is producing aluminium with the lowest energy consumption and emissions in the world.