1. Fraser M et al (2021) Circularity gap report, https://www.circularity-gap.world/2021. Accessed 24 Sept 2021
2. Hickman C et al (2021) Preprint athttps://doi.org/10.2139/ssrn.3918955
3. https://www.unep.org/news-and-stories/press-release/worldwide-extraction-materials-triples-four-decades-intensifying (accessed on 25 Sept 2021)
4. IPCC (2021) Climate Change 2021: The physical science basis. https://www.ipcc.ch/report/ar6/wg1/. Accessed on 24 Sept 2021