Six countries have pledged to triple their nuclear power capacity by 2050 at the UN Cop 29 climate conference in Baku, Azerbaijan, as part of an initiative launched at last year's summit in Dubai.
El Salvador, Kazakhstan, Kenya, Kosovo, Nigeria and Turkey today joined 25 countries that had already signed up to the pledge, which was first announced at Cop 28 in Dubai.
Turkey has plans to build 20GW of nuclear capacity by mid-century, from no operational plants currently.
Kazakhstan's commitment follows a nationwide referendum last month in which the country voted in favour of constructing a nuclear power plant.
The US, an original signatory to the pledge, yesterday announced its target to add 200GW of net new nuclear by 2050, from some 97GW now.
White House national climate advisor Ali Zaidi told delegates at a Cop 29 side event today that he has "confidence in the durability" of the Biden administration's approach to clean energy action, and does not expect it to pause following Donald Trump's victory in the recent US election.
Zaidi pointed in particular to bipartisan consensus on the country's infrastructure law, which includes support for nuclear power, and growing political consensus on the Inflation Reduction Act.