This report covers: (1) legislation about various pollutants emitted from ships; (2) available technology to control emissions of these pollutants from ships; (3) MEET technology for estimating future emissions from ships; and (4) proposed reduction factors. Sulphur oxides are emitted from ships using marine gas oil or marine diesel oil; relevant legislation is contained in several European Commission (EC) directives and International Maritime Organization (IMO) regulations. Regulations for nitrogen oxides (NOx) have been approved by the IMO and the Swedish Government. In 1996, the US Environment Protection Agency (EPA) adopted exhaust emission standards for marine petrol engines, to reduce emissions of volatile organic compounds (VOC) and carbon monoxide (CO). The US state of California is proposing legislation for such emissions. The report describes several primary and secondary methods for reducing pollutant emissions from ships. It also outlines the MEET methodology for estimating emissions from ships, which uses a simple formula for calculating the emissions of different pollutants in terms of usage of fuels and distances travelled by ships with different engine types. Tables are given of the emission factors and proposed reduction factors used in low reduction, medium reduction, and high reduction scenarios.