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. 2023 Mar 16:1–44. Online ahead of print. doi: 10.1007/s10311-023-01589-z

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Fig. 6 — a Biomethane production trend in European countries from 2011 to 2021 (European Commission 2022b; Sacha Alberici et al. 2022). b The capacity of biomethane production of each European country countries in 2018 (EBA 2021). bcm, billion cubic meters