en2015-08-18 18:07 PM CESThttp://inspire.ec.europa.eu/codelist/CommodityCodeValue/coalBedMethane:1http://inspire.ec.europa.eu/codelist/CommodityCodeValue/coalBedMethaneCoal bed methane (CBM) or coal seam gas (CSG) is a form of natural gas extracted from coal beds. Coal bed methane contains very little heavier hydrocarbons such as propane or butane, and no natural-gas condensate. It often contains up to a few percent carbon dioxide. http://en.wikipedia.org/wiki/Coal_bed_methane