1. Pauliuk, S., Milford, R. L., Müller, D. B. & Allwood, J. M. The steel scrap age. Environ. Sci. Technol. 47, 3448–3454 (2013).
2. Steel Statistical Yearbook (World Steel Association, 1990–2020); https://www.worldsteel.org/steel-by-topic/statistics/steel-statistical-yearbook.html
3. Iron and Steel Technology Roadmap: Towards More Sustainable Steelmaking (International Energy Agency, 2020); https://www.iea.org/reports/iron-and-steel-technology-roadmap
4. Climate Change and the Production of Iron and Steel (World Steel Association, 2021); https://worldsteel.org/publications/policy-papers/climate-change-policy-paper/
5. Fennell, P., Driver, J., Bataille, C. & Davis, S. J. Cement and steel—nine steps to net zero. Nature 603, 574–577 (2022).