An article presenting project’s analyzes (at the request of the Metropolitan Area Gdańsk-Gdynia-Sopot) aimed at examining the possibilities of using LNG and bio-LNG: as a backup source of energy supplying trolleybus station power network (for the needs of the Trolleybus Transport Company in Gdynia), as an ecological fuel for water trams (for the needs of Gdańsk Shipping Ltd) and as a source of using waste for fuel production (for the needs of Waste Treatment Utility in Gdańsk) was published in the magazine “Nowa Energia” (New Energy).