The article discusses the substantial costs involved in decarbonising the EU aviation and maritime sectors to align with emissions reduction goals. Estimates indicate that around €61 billion and €39 billion per year will be needed for the aviation and maritime sectors, respectively. Despite the high costs, there is a positive outlook on the adoption of renewable hydrogen and e-fuels in transportation, with projections showing a significant rise in their usage by the end of the decade. Additionally, Singapore's initiative to develop new bunkering standards for methanol and ammonia reflects a broader trend towards cleaner marine fuels. The global maritime industry is also considering the implementation of a carbon levy on shipping as a potential solution to tackle emissions. Overall, the article highlights the financial challenges and market shifts expected as the EU and other regions strive to decarbonise key sectors and embrace cleaner energy alternatives.