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Ceres I is a large crude oil carrying supertanker.

There are not many cleaner alternatives to existing maritime fuels, as current batteries are too heavy to be feasible for the world’s massive supertankers, and other technology remains in its infancy.

“The latest efforts to decouple the economy from carbon and energy intensity has not yet ‘turned the supertanker,’” said Swithin Lui, a policy expert with Climate Action Tracker.

The United Nations said on Friday it had completed the removal of more than 1 million barrels of oil from a decaying supertanker off Yemen's Red Sea coast, averting a potential environmental disaster.

The United Nations has started a operation to remove 1.1 million barrels of oil from a decaying supertanker moored off Yemen's Red Sea coast.