Figure 1
The flowchart shows a left-to-right sequence of rounded rectangular boxes connected by directional arrows. On the far left, a large, rounded rectangle is labeled “Organic material (agricultural waste)”. A thick horizontal arrow points right from this box to a smaller, rounded rectangle in the center labeled “Anaerobic digestion (biodigestor)”. From this central box, a thick vertical upward arrow points to the label “Biogas”. From the “Biogas” label, a thick horizontal arrow points right toward another rounded rectangle labeled “Cleaning and upgrading”. From this box, a final thick horizontal arrow points further right to the label “Biomethane”.Simplified biomethane production process. Source: Adapted from International Energy Agency (2023)