Background
The SSA EU-wide emission trading system of NOx and SO2
The proposed emission trading system gives ship owners the possibility of refunds on emission reduction investments by selling emission reduction credits to other emitters. Other benefits for ship owners are that the proposed system is voluntary (no regional regulations and no charges), that it leads to fair competition and that it rewards environmentally proactive ship owners.
Marginal abatement costs of NOx and SO2 for land-based emitters and ships indicate that potential refunds for the ships could be in the region of 1000 €/ton reduced NOx and 200 €/ton reduced SO2. The entire report or short version can be downloaded on pdf, see links below: