Sweden's Scandinavian Biogas Fuels (SBF) is ramping up its production of green bunkers with a second plant in Skogn, Norway.

The world's biggest biogas producer is investing NOK 170m ($21m) in the factory outside Trondheim.

The idea is to supply domestic cruiseship and ferry operator Hurtigruten's fleet with liquid biogas (LBG), among other owners.