新预测：美国气候政策转向拖累全球气候治理

Core Viewpoint - In the first half of this year, U.S. greenhouse gas emissions surged, leading to a global increase in emissions compared to the same period last year, with a new forecast indicating that the U.S. government's shift towards fossil fuel support will hinder global climate governance [1] Group 1: U.S. Climate Policy Changes - The U.S. energy and climate policy has undergone the most drastic shift in recent years since President Trump returned to the White House, which will reduce the U.S. emission reduction rate to half of what was achieved in the past 20 years [1] - In the best-case scenario, where fossil fuels become more expensive and renewable energy is rapidly deployed, U.S. greenhouse gas emissions could only decrease by 43% by 2040, significantly lower than the previous administration's commitment to reduce emissions by 61% to 66% from 2005 levels by 2035 [1] Group 2: Global Climate Impact - The shift in U.S. climate policy is expected to have profound implications for the global climate crisis, potentially leading to an increase in U.S. greenhouse gas emissions by the end of the 2030s if the development of clean energy is severely constrained by economic and political factors [1]