As delegates from nearly 200 countries gather for a major international summit on climate change, they're confronting a new era of uncertainty for the U.S. under a second Trump administration.

World leaders are expected to discuss a range of issues including how to limit long-term global temperature rises to 1.5C - a target set by the Paris Agreement.

Officials from around the world will soon convene in Azerbaijan to negotiate the latest round of climate talks at COP29. Here's what they'll be talking about.