Ocean shipping accounts for about 2-3% of world GHG emissions. Meantime, cattle are an even larger source, due to the methane they produce during digestion and through manure. They account for the biggest part of the 14.5% of all GHG emissions produced by livestock.
Be that as it may, Japan’s Mitsui O.S.K. Lines, Ltd. (MOL), and MOL Sunflower Ltd are eyeing that manure as a source of marine fuel — liquefied biomethane, or bio-LNG.
MOL and MOL Sunflower are cooperating with Hamanaka Town, JA...
https://www.marinelog.com/legal/environment/mol-eyes-cow-manure-as-a-source-of-bio-lng/