The purpose of this paper is to turn focus on CO₂ emissions from marine engine operation. The paper describes the attention from the world society, the regulation expected from international organisations and how we can influence CO₂ emission by means of engine optimisation, waste heat recovery and alternative fuels.

MAN Diesel & Turbo is convinced that CO₂ emission will continue to be an important subject and, eventually, strict regulations influencing the ship speed and operation will be introduced.