Today, the way aluminum is being done is the way it's been done for a hundred years. There is just one way. Basically, you put alumina in a bath and then you put an anode—an electrode—in that alumina bath. That chemical reaction creates aluminum. The process used in the world is called Hall–Héroult, which basically uses anodes, which are in carbon. That's what everybody in the world, everywhere, has done for a hundred years. That chemical reaction creates aluminum, but the anodes progressively dissolve and they have to be changed every 20 days. As the anodes dissolve in the carbon, you release CO2 into the atmosphere, basically.
Maybe, Nigel, you can help me if I say anything wrong.
That's the process. When I say that we emit 2.3 tonnes of CO2 per tonne of aluminum, that's the bulk of it. What ELYSIS is about—and I'll stop there—is using anodes that are not formed of carbon while creating a chemical reaction that still produces aluminum with the same alumina. If you do that and you use hydro power, you are left with CO2 emissions in your alumina refineries and in bauxite mining that are of a smaller magnitude.
Nigel, is there anything you want to add on that?