World leaders kick off UN climate talks next week, days after a knife edge US election that could send shockwaves through global efforts to limit dangerous warming. The stakes are high for the COP29 conference in Azerbaijan where nations must agree a new target to fund climate action across huge swathes of the world. It comes in a year likely to be the hottest in human history that has already witnessed a barrage of devastating floods, heatwaves and storms in all corners of the globe.

Nations are falling far short of what is needed to keep warming from hitting even more dangerous highs in the future. But leaders arriving in Baku are wrestling with a host of challenges, including trade spats, economic uncertainty and conflicts in the Middle East and Ukraine. Adding to the uncertainty, the US vote and potential return of Donald Trump, who pulled out of the Paris Agreement and has called climate change a "hoax", could ripple through the negotiations and beyond.

"You can imagine that if Trump is elected, and if the election outcome is clear by the time that we get to Baku, then there will be sort of a crisis moment," said Li Shuo, a Washington-based expert on climate diplomacy at the Asia Society Policy Institute. He said that countries, likely including China, are preparing to send a "clear message" in support of global climate cooperation if Trump beats his rival Kamala Harris to the White House. The UN talks are seen as critical to laying the groundwork for a major new round o.