Biogas is a renewable fuel that consists of 97 % methane. It is produced through the digestion of organic waste and it is a part of a natural ecocycle. Right after the digestion process the methane content is only about 70 %. The rest of the gas is CO2, sulfurdioxide and other gases that need to be removed. The gas has to be upgraded to a 97 % methane content to be used as vehicle fuel. 

In Kristianstad biogas is produced in three locations: in a digestion plant, in a waste water treatment plant and in an old landfill.