A surge in hydropower output in China this year, boosted by record-breaking rainfall, is helping the world's biggest polluter meet green targets as well as cut liquefied natural gas imports (LNG) amid tight global supplies.

Global coal and LNG prices have hit record highs this year, fanning inflation, as Western sanctions on Russia disrupted supplies from one of the world's top energy exporters.

But slowing demand from China, among the world's top coal and LNG importers, has put a lid on prices.