A group of leading environmental groups have written to IMO secretary general Kitack Lim urging him to raise the organisation's carbon reduction goals and work toward decarbonising the world fleet before 2050.

In the letter the green groups pointed out that the International Panel on Climate Change (IPCC) has said that the decarbonisation of shipping is required by 2050 to meet the Paris Agreement on Climate Change’s target of keeping global warming to 1.5