True scale of C0₂ emissions from shipping revealed

The true scale of climate change emissions from shipping is almost three times higher than previously believed, according to a leaked UN study seen by the Guardian.

It calculates that annual emissions from the world's merchant fleet have already reached 1.12bn tonnes of CO₂, or nearly 4.5% of all global emissions of the main greenhouse gas.

The report suggests that shipping emissions - which are not taken into account by European targets for cutting global warming - will become one of the largest single sources of manmade CO₂after cars, housing, agriculture and industry. By comparison, the aviation industry, which has been under heavy pressure to clean up, is responsible for about 650m tonnes of CO₂emissions a year, just over half that from shipping.

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