In this paper, we describe pathways for the Danish maritime cargo sector to CO 2 e (equivalent) neutrality in 2050 in compliance with the Paris Agreement. In our model approach, we not only include national greenhouse gas emissions, but also suggest a method to assign greenhouse gas emissions from international shipping to countries. Our modelling results indicate, that either strong regulative carbon budgets or a carbon price of 350-450 e 2016 /t CO 2 e would be necessary to induce the urgent transition. This would double today's average cargo transport costs, but increase average import values only by 6-8 %. Regarding fuel technologies, hydrogen, methanol and ammonia are most compatible from a socio-economic cost perspective. Though, due to high cost uncertainties, there is no clear winner. Liquefied natural gas as an alternative intermediate solution would only have a short window of opportunity, due to methane leakage causing high greenhouse gas emissions as well as high fuel and technology costs. If this gaseous fuel is based on renewable sources it can play a role, but only in case of drastically reduced methane leakage.
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