UN Secretary-General, António Guterres, says developed countries must honour the promise of 100 billion dollars a year in climate finance.

He said they must also deliver a clear plan on how they would meet their commitment to double adaptation finance to at least 40 billion dollars a year by 2025.

Gutteres made the call on Monday at a virtual news conference organised by the United Nations Environment Programme UNEP to launch the 2023 edition of the Emissions Gap Report.

According to Guterres, the EGR shows that if nothing changes in 2030, emissions will be 22 giga-tons higher than the 1.5 degree limit will allow.

He said it showed greenhouse emissions reaching an all-time highs, a 1.2 per cent increase on the last year, when those levels should be shooting down.