US President Donald Trump withdrew the United States from a key climate treaty and dozens of other international groups. The move, formalized Wednesday, impacts 66 organizations, nearly half affiliated with the United Nations. The UN Framework Convention on Climate Change, which underpins global efforts against warming, is among those affected.

The White House stated these entities "no longer serve American interests" and promote "ineffective or hostile agendas." The decision follows a review alleging wasteful spending of taxpayer money. Funding and involvement will cease for groups deemed to advance "globalist agendas over US priorities."

International reaction is expected to be swift. Many nations view multilateral cooperation as essential to addressing climate change and other global challenges. The withdrawal raises questions about future US engagement in international affairs.

Trump previously defunded organizations he opposed and dismissed man-made climate change as a "hoax." This latest action signals a further shift away from international collaboration.

The long-term consequences of these withdrawals remain to be seen. Further announcements regarding US participation in international bodies are anticipated.