President Donald Trump is withdrawing the United States from the world’s overarching treaty on climate change in a move that escalates his attempts to reverse years of global negotiations toward addressing rising temperatures.

The announcement to sever ties with the U.N. Framework Convention on Climate Change came as Trump quit dozens of international organizations that the White House says no longer serve U.S. interests by promoting radical climate policies and other issues. It was outlined in a memo by the White House. Trump has called on other countries to abandon their carbon-cutting measures, and the move appears to be his latest attempt to destabilize global climate cooperation.

The 1992 UNFCCC serves as the international structure for efforts by 198 countries to slow the rate of rising climate pollution. It has universal participation. The U.S. was the first industrialized nation to join the treaty following its ratification under former President George H.W. Bush — and it will be the only nation ever to leave it. The move also marks Trump’s intensifying efforts to topple climate efforts compared to his first term, when he decided against quitting the treaty.

“Many of these bodies promote radical climate policies, global governance, and ideological programs that conflict with U.S. sovereignty and economic strength,” stated a White House fact sheet.

The move comes as Trump tears down U.S. climate policies amid the hottest decade ever recorded and threatens other nations for pursuing measures to address global warming, which Trump has called a hoax and a “con job.” The U.S. did not send a delegation to Brazil for the climate talks, known as COP30, late last year. Instead, Trump officials have been working to strike fossil fuels deals with other nations. Trump captured Venezuela’s strongman president, Nicolás Maduro, in an assault using U.S. commandos on Saturday and said he would control the country’s vast oil resources.

The plan to leave the UNFCCC stems from Trump’s order last February requiring Secretary of State Marco Rubio to identify treaties and international organizations that “are contrary to the interests of the United States” and recommend withdrawing from them.

Trump has also pulled the U.S. out of the Paris Agreement, the landmark 2015 pact that’s underpinned by the UNFCCC.

“This is a shortsighted, embarrassing, and foolish decision,” Gina McCarthy, a former EPA administrator under former President Barack Obama, said in a statement. “As the only country in the world not a part of the UNFCCC treaty, the Trump administration is throwing away decades of U.S. climate change leadership and global collaboration.”