The U.S.—the world’s second largest emitter of greenhouse gases—formally withdrew from the U.N.’s 2015 Paris climate change agreement on Nov. 4.

Now ratified by 189 countries, the Paris Agreement is the most important international accord on combating climate change. It sets a central goal of limiting global average temperature increase to well below 2 degrees Celsius over the pre-industrial era—a threshold at which the impacts of climate change become catastrophic for life on earthคำพูดจาก สล็อตเว็บตรง. Under the Obama administration, the U.S. was central to negotiating the deal five years ago.

But in June 2017 President Donald Trump ann…