depends - the alumina->Al part of Al production is often done in places with cheap, reliable electricity sources. Here in New Zealand it's all hydro power, no c

depends - the alumina->Al part of Al production is often done in places with cheap, reliable electricity sources. Here in New Zealand it's all hydro power, no carbon emissions, but essentially burning carbon electrodes on the Al pot lines into CO2 is 5% of our national carbon emissions