The Guardian has managed to get its ink-stained hands on a leaked copy of a UN study that finds CO2 emissions from shipping may be treble what was previously believed.
The report suggests that shipping contributes 1.12 bn tonnes of CO2 annually, far more than the 650 m tonnes attributed to the aviation industry. The revised figures leave shipping as contributing 4.5% of global GHG emissions.
If unchecked, shipping emissions are predicted to increase as much as 30% by 2020.

