Member states of the International Maritime Organization will decide on Friday whether to formally adopt a plan to cut carbon emissions in the face of opposition from the United States.

The London-based IMO, which is the shipping body of the United Nations, voted in April for a global pricing system to help curb maritime carbon emissions.

Leading up to Friday's decision -- China, the European Union, Brazil, Britain and several other members of the IMO -- this week reaffirmed their support at a summit in the British capital.

However, Washington's threat to impose sanctions on those supporting it has cast doubt on the future of the Net Zero Framework (NZF), the first global carbon-pricing system.

"I am outraged that the International Maritime Organization is voting in London this week to

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