Earlier this year, the International Maritime Organisation (IMO) has issued a regulation, namely IMO Sulphur 2020, imposing stricter limits to the sulphur content of marine fuel oils. The maritime industry has historically relied on sulphur-rich types of fuels which are extremely dangerous for the environment. The regulation is part of the IMO 2018 project to decarbonise the maritime industry by halving its emissions by 2050. However, while the unexpected developments linked to the emergence of the COVID-19 pandemic have thrown the global economy into recession, they have also marked a huge hit for the maritime industry, particularly for shipping lines and bunkering services providers. As a result, many have started to believe that the current situation coupled with a grim outlook for the future, may favour the adoption of greener alternatives such as Liquefied Natural Gas (LNG) or even carbon-free hydrogen-originated ammonia. Both solutions present various advantages, but also some technical challenges which require to be addressed to make them economically feasible anytime soon.