A desktop revision was conducted for the 2019 Sustainability Update and was informed by Alcoa’s materiality assessments of its bauxite and alumina divisions.

We have also conducted a mapping exercise to determine the alignment of the Company’s material topic definitions relevant to any of the seventeen SDGs set by the UN. The alignment based on the associated SDG targets and indicators. Through the analysis that was conducted, the SDGs that are most impactful to Alumina based on its broader material topic definitions were identified and mapped in the following table.