The 50-MW solar facility will be located in the municipality of Minas de Riotinto, where Atalaya’s local subsidiary operates the historic Riotinto mine.
The interim government of Guinea asked international mining companies to present plans to refine their bauxite production into alumina within the country by May 2022.
The concerns center around the production of aluminum, raising questions for another key industry about alleged human rights abuses in its supply chain.
Chief Executive Jakob Stausholm said the company had committed to increasing research spending to develop technologies enabling its customers to decarbonize.
Rio's move effectively cuts Rusal's access to production and management at the refiner under an Australian ban against exporting alumina and aluminum ores.