It is a question that may not have occupied much of the brain energy of those of you who follow my humble blog, EVEN those of you who are concerned about and follow with some care issues about carbon emissions and climate change. How much carbon is emitted by all those commercial vessels in the ocean. Vessels travelling across the Pacific from, say, Shanghai, China to Long Beach, California, packed with consumer goods, automobiles, and so forth. Aren't they driven forward with diesel fuel? Are efforts underway to decarbonize ocean shipping? If so: how have they fared? I have looked into this in more depth that I care to expound upon just now. All I will say is: 1) Yes, such efforts are underway, 2) They may have made a modest contributions to the supply chain problems now being blamed on the Covid epidemic, but 3) the market is readjusting, and green shipping may be an industry-defining reality a lot sooner than green commercial transport on land.