A $60 per tonne carbon equivalent levy from 2025 on marine fuel oil, increasing to $150 by 2030, has been proposed by a Danish non-governmental organisation to give a financial incentive for burning green ammonia or methanol.

With revenues reimbursed as support for ship operators using green fuels, the proposal “could result in decarbonisation of shipping towards 2040… aligned with the Paris [climate] agreement,” said Green Transition Denmark.