 Some of these also offer LNG for heavy transport.In 2011, Gasum started biogas production by using anaerobic digestion.Gasum is involved in several international organizations, such as Eurogas, European Network of Transmission System Operators for Gas (ENTSOG), Gas Infrastructure Europe (GIE), International Gas Union (IGU), European Gas Research Group (GERG) and the European Pipeline Research Group (EPRG).