1990 and 2003 by 80 per cent. According to an unpublished report by the International Maritime Organisation, shipping emitted around 800 million tonnes of CO2 in 2007, which amounts to almost three per cent of global emissions. This means shipping related CO2 emissions have almost doubled over the past ten years. Other sources are indicating even higher figures, up to 1210 million tonnes or nearly 4.5 per cent of global CO2 emissions.