The European Commission will propose including shipping companies in the emissions trading scheme (ETS), the EU's principal tool for fighting global warming. In doing so, the Commission is reacting to the lack of concrete measures that it was thought should have been taken by the International Maritime Organisation to fight CO2 emissions. It is not yet known how and when the industry will be included in the ETS, but the Commission should draft legislation by the end of 2007. Global CO2 emissions from shipping are expected to increase by 75 per cent in the next 15 to 20 years. It is also becoming the biggest source of air pollution in the EU, which controls 41 per cent of the world's fleet.