The US has canceled about $4bn in pledged money to the UN's Green Climate Fund, the latest sign a sharp policy shift under President Donald Trump.
The State Department late last week said the US "has rescinded outstanding pledges to the Green Climate Fund," but did not provide any further details.
The US under former presidents Joe Biden and Barack Obama had pledged about $6bn combined to the GCF, with the most recent commitment announced at the Cop 28 climate talks in Dubai. But the two administrations were able to deliver only $2bn of the funding.
The cancellation of the GCF pledges is just the latest step by Trump to quickly reverse course for US climate and clean energy policies. Among his first acts after taking office last month Trump ordered the US to exit the Paris climate agreement and to pause spending on renewable energy projects. In addition, secretary of state Marco Rubio said the US would stop engaging in climate diplomacy.
The GCF finances projects in developing and emerging countries with a focus on mitigation, adaptation and resilience efforts, such as climate-friendly agricultural methods, reforestation or coastal protection. It operates under the UN Framework Convention on Climate Change and was originally capitalized with $10.3bn in 2015. In two replenishment rounds since then, it has gathered more than $20bn in additional pledges.
The fund has to date approved nearly $16bn for project in more than 130 countries and expects to approve another $3bn-worth this year.
The fund said it "remains determined" to help developing countries achieve the highest level of ambition possible.
"If pledges are not fully realized, our ability to support the climate ambitions of developing countries will be constrained," the GCF said.
Finance for developing countries has been a major issue at UN climate talks. At last year's Cop 29 in Baku, Azerbaijan, countries agreed to a "new collective quantified goal" of "at least" $300bn/yr for developing countries by 2035, with developing countries "taking the lead." The goal is meant to build on the $100bn/yr that developed countries agreed to deliver over 2020-25. The finance will come from "a wide variety of sources, public and private, bilateral and multilateral, including alternative sources".