The United Nations' COP climate talks are "no longer fit for purpose" and need an urgent overhaul, key experts including a former UN secretary general and former UN climate chief have said. In a letter to the UN, senior figures say countries should not host the talks if they don’t support the phase out of fossil energy.

Recently, some high-profile experts-the former UN secretary-general and a former UN climate chief-advocated for a climactic shake-up of the United Nations' COP climate talks.

For the third straight year, efforts to fight climate change haven't lowered projections for how hot the world is likely to get — even as countries gather for another round of talks to curb warming, according to an analysis Thursday.

Right-wing president Javier Milei has withdrawn Argentina ’s delegation from the Cop29 UN climate summit in Baku, Azerbaijan. The decision, confirmed by delegate officials, means the South American country will not participate any further in the UN climate negotiations that are expected to conclude with a treaty next week.

Argentine delegates at the COP29 United Nations climate summit in Baku, Azerbaijan, have been ordered to withdraw from negotiations and return home, according to a source at the country’s foreign ministry.

Argentina’s president, Javier Milei, has withdrawn his country’s delegates from the United Nations COP29 Summit on climate science one day ahead of a planned two-day visit to the United States that may include a stopover at President-elect Trump’s Mar-a-lago.