Rusal has fully converted the Krasnoyarsk Aluminium Smelter to Ecological Soderberg technology. A total of 1954 electrolysers were transferred to this technology, which made it possible to significantly reduce harmful emissions. Investments into the project at this stage of environmental modernization of the smelter alone amounted to $74 mn. On the whole, from 2004 to 2019, expenditures on environmental protection measures at KrAZ amounted to over $390 mn.