The Finnish shipping company Viking Line announced to have started to offer passengers boarding their ships operating the Turku-Åland-Stockholm route Possibility to purchase biofuel from renewable sources in proportion to the quantity of liquefied natural gas which is usually burned for their journey by the ships employed on this route, "thus reducing - it has highlighted the company - the emissions of their journey up to 90%'. Viking specified that the additional price for the Turku-Stockholm route is less than five euros and that the biofuel in issue is biogas produced from waste materials with which the ships Viking Glory and Viking Grace are refueled by the energy company Gasum.