The Trump administration has halted the participation of U.S. scientists in key U.N. climate change assessments, two sources familiar with the situation told Reuters, part of its broader withdrawal from climate change mitigation efforts and multilateral cooperation.

State Department officials won't participate in next week's meeting of the top UN climate science panel, sources familiar with the matter told Axios. Why it matters: A U.S. absence from the U.N. Intergovernmental Panel on Climate Change meeting in Hangzhou,