After successfully reducing emissions of pollutants like sulfur and nitrogen, the global shipping industry now is focused on ratcheting down — and eventually eliminating — its emissions of carbon dioxide (CO2) and other greenhouse gases (GHGs). It’s no easy task. Crude-oil-based bunker like low-sulfur fuel oil (LSFO) and marine gas oil (MGO) are readily available, relatively inexpensive, and pack a lot of energy into each gallon. But GHG-reduction goals are in place, both globally and in the European Union (EU), and shipping companies are taking steps to meet them, initially with more LNG-fueled vessels and later with ships powered by clean methanol, clean ammonia and biofuels. In today’s RBN blog, we discuss the shift in bunker fuel consumption since IMO 2020 was implemented five years ago and the efforts to transition to even cleaner shipping fuels through the late 2020s and beyond.