Greece has several types of biomass available for biogas production There are an estimated 17 million tonnes of agrifood refuse and wastewater produced by 250 small-medium sized businesses and 30,000 livestock farms respectively. Two million tonnes of green waste could also be used such as straw, agricultural residues and discarded pruning material. This could lead to an increase in the number of biogas plants in Greece, which currently have an installed capacity of 83 MW and are mainly supplied by landfill sites or sewage treatment plants.