Sustainable development is imperative of the modern-day. It considers development of technological benefits of modern society, along with preservation of nature and without distortion of balance in human surroundings. Therefore, nowdays ecological issues are in avoidable in all of industry. The awareness for preserving the Earth, restoring harmful outcomes and preventing further pollution is rising. Law regulations are developing, green technological solutions are looking for and awareness of people is changing. In this work, the topic of preventing atmosphere pollution because of marine vessels is covered, regarding transport being significant atmosphere pollutant. In that case the impact of marine transport is notable. In the work, the connection between ecology, environmental policies of the ship owners and air pollution is addressed. There is a more detailed description of law regulation that refers on prevention and control of emission from ship pollutants, especially Annex VI. of MARPOL 73/78 convention which refers to prevention of air pollution. Most common air pollutants, emission sources and some of technological solutions which reduce emission of that gasses from ship engines are mentioned. The future are green ships driven by renewable energy sources.