On Dec. 12, 2015, delegates from 195 countries and the European Union adopted the Paris Agreement, the first global climate pact to draw in both rich and poor nations
It was a Saturday evening at Le Bourget, a former airfield northeast of Paris, when negotiators at the 21st U.N. climate conference finally ran out of things to argue about. After years of stalemate, including the bruising collapse of the 2009 Copenhagen summit, the delegates were asked to approve a single text. They did.
The Gavel Falls
The agreement's design was its central bargain. Earlier efforts, most notably the 1997 Kyoto Protocol, had imposed binding targets mainly on wealthy countries, and the United States never ratified it. Paris took a different route. Each nation would submit its own national pledge for cutting emissions, and the pledges would be reviewed and ratcheted up over time. The text committed governments to holding the rise in average global temperature to well below 2 degrees Celsius above pre-industrial levels and to pursuing efforts to limit it to 1.5 degrees. Laurent Fabius, France's foreign minister and president of the conference, guided the final text to adoption, and Christiana Figueres, the U.N.'s climate chief, had spent years preparing the ground. Delegates in the hall rose in applause. The deal got its unanimity partly by leaving the hardest part, the actual cuts, up to the countries themselves.
The agreement moved faster than almost anyone expected afterward. It entered into force on Nov. 4, 2016, less than eleven months after adoption, once enough countries representing enough emissions had formally joined. Then came a twist in the story of a pact that had succeeded by including everyone. In 2017, President Donald Trump announced that the United States would withdraw, and the exit became effective in November 2020. The U.S. rejoined in early 2021 under President Joe Biden. The pledges that countries submitted in Paris, scientists noted, were not enough on their own to reach the stated goals, which is why the agreement required the promises to be renewed. The deal had been designed to be revisited, and it has been, repeatedly.
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