, April 28 -- Efforts to revive a historic climate deal for the global shipping industry are foundering on U.S and Saudi opposition, with negotiators gearing up for a "real fight" in talks this week.

Discussions starting on Monday at the International Maritime Organisation (IMO) in London mark the first time countries have come together since the U.S was accused in October of using "bully-boy tactics" to sink the UN-backed net zero framework for shipping.

China and European countries have backed the plan to impose a carbon price on emissions for ships bigger than 5,000 tons. Provisionally agreed in April last year, it was expected to generate revenues of up to US$15bn per year from 2030, with the aim of incentivising a shift to greener ...