Nearly a tenth of global climate finance could be under threat as US president Donald Trump’s aid cuts risk wiping out huge swathes of spending overseas, according to Carbon Brief analysis.

Last year, the US announced that it had increased its climate aid for developing countries roughly seven-fold over the course of Joe Biden’s presidency, reaching $11bn per year.

This likely amounts to more than 8% of all international climate finance in 2024.

However, any progress in US climate finance has been thrown into disarray by the new administration.

Trump has halted US foreign aid and threatened to cancel virtually all US Agency for International Development (USAid) projects, with climate funds identified as a prime target.

USAid has provided around a third of US climate finance in recent years, reaching nearly $3bn in 2023, according to Carbon Brief analysis.

Another $4bn of US funding for the UN Green Climate Fund (GCF) has also been cancelled by the president’s administration.

One expert tells Carbon Brief that more climate funds will likely end up on the “cutting block”.

Another warns of an “enormous gulf” to meeting the new global $300bn climate-finance goal nations agreed last year, if the US stops reporting – let alone providing – any official climate finance.

Carbon Brief’s analysis draws together available data to explain how the Trump administration’s cuts endanger global efforts to help developing countries tackle climate change.