The White House announcement, which came as Trump was sworn in Monday to a second term, echoed Trump's actions in 2017, when he announced that the U.S. would abandon the global Paris accord. The pact is aimed at limiting long-term global warming to 2.7 degrees Fahrenheit (1.5 degrees Celsius) above pre-industrial levels or, failing that, keeping temperatures at least well below 3.6 degrees Fahrenheit (2 degrees Celsius) above pre-industrial levels.

Last year's global average temperature easily passed 2023's record heat and kept pushing even higher. It surpassed the long-term warming limit of 1.5 degrees Celsius (2.7 degrees Fahrenheit ) since the late 1800s that was called for by the 2015 Paris climate pact, according to the European Commission's Copernicus Climate Service, the United Kingdom's Meteorology Office and Japan's weather agency.

Countries at the United Nations climate summit amped up the pressure on themselves on Friday by entering the last scheduled day of talks with no visible progress on their chief goals.

Just as a simple lever can move heavy objects, rich nations are hoping another kind of leverage — the financial sort — can help them come up with the money that poorer nations need to cope with climate change.

Cities in Asia and the United States emit the most heat-trapping gas that feeds climate change, with Shanghai the most polluting, according to new data that combines observations and artificial intelligence.

Global efforts to fight climate change stumbled but survived the last time Donald Trump was elected president and withdrew the United States from an international climate agreement. Other countries, states, cities and businesses picked up some of the slack.

The actions in Berlin, Brussels, Rio de Janeiro, New Delhi and many other cities were being organized by the youth-led group Fridays for Future, and included the group's New York chapter, which planned a march across the Brooklyn Bridge followed by a rally that organizers hoped would attract at least 1,000 people. More protests were planned Saturday and Sunday.

The amount and proportion of the powerful heat-trapping gas methane that humans spew into the atmosphere is rising, helping to turbocharge climate change, a new study finds.

Summer 2024 sweltered to Earth's hottest on record, making it even more likely that this year will end up as the warmest humanity has measured, European climate service Copernicus reported on Friday.

Moves toward phasing out fossil fuel use and gas-powered engines, for example, haven't worked by themselves, but they are more successful when combined with some kind of energy tax or additional cost system, study authors concluded in an exhaustive analysis of global emissions, climate policies and laws.