Host Brazil will preside and set the agenda. For the talks to be a success, world leaders need to beef up efforts and money for adapting to climate change and fund billion-dollar efforts to prevent deforestation and land degradation, said Suely Vaz, who used to run Brazil’s environment agency.

California aims to build on its reputation as a global climate leader at this year's COP conference in Belém, Brazil.

For three decades, the United Nations has been holding an annual summit on the climate known as COP, which stands for Conference of the Parties. Delegates travel to a chosen city from around the world to try to find ways to prevent or mitigate the worst effects of global warming.

In the leadup to the annual United Nations climate conference, the U.N. Development Programme has released new data about how climate change is going to affect agriculture, extreme weather and other factors that often mean life or death for people in poverty.

This marks the first time the Democratic governor and likely presidential contender will attend the summit, which begins Nov. 10.

Young people are climate change activists, but largely excluded from global meetings, and aren’t taken seriously when they do get there.

The Paris Agreement was meant to mark a turning point. Ten years later, emissions keep rising. At COP30, much is at stake.

World leaders and international officials, including UN Secretary-General António Guterres, warned during a summit in Brazil ahead of the 2025 UN Climate Change Conference (UNFCCC COP 30)— scheduled from November 10 to 21 — that the world may fail to limit global warming to 1.