1. Alcoa (2021). 2021 Alcoa Sustainability Report. Retrieved from https://www.alcoa.com/sustainability/en/flipbook/index.html.
2. AngloAmerican (2019) Our sustainable mining plan FutureSmart Mining™:The Blueprint for the Future of Our Business. Retrieved from https://www.angloamerican.com/sustainability/our-sustainable-mining-plan.
3. AngloGold Ashanti (2018). Sustainable Development Report. Retrieved from https://www.anglogoldashanti.com/sustainability/reports/#2018.
4. Antofagasta Minerals (2019). Sustainability Report. Retrieved from https://www.antofagasta.co.uk/sustainability/sustainability-report-library/.
5. A.R. M. (2021) Annual Sustainability Data Report. Retrieved from https://arm.co.za/wp-content/uploads/2021/12/ARM-ESG-2021_Cover.pdf.