国际团队发布重磅报告称：世界达到第一个气候临界点

Core Insights - The world has reached its first climate tipping point, with global warming surpassing the critical threshold of 1.5°C, leading to significant threats to key ecological systems [1][2] - The report highlights the irreversible damage to warm-water coral reefs, which are crucial for the livelihoods of nearly 1 billion people and support a quarter of marine biodiversity [1][2] Group 1: Climate Tipping Points - The current global temperature has risen approximately 1.4°C, with warm-water coral reefs having a thermal tipping point estimated at 1.2°C, indicating they have crossed an irreversible threshold [1] - Other critical systems are on the brink, including the irreversible melting of Greenland and Antarctic ice sheets, which will lead to long-term sea-level rise [2] - The Amazon rainforest may begin to experience widespread die-off at a temperature increase of 1.5°C, affecting over 100 million people who rely on its resources [2] Group 2: Urgent Action Required - The report emphasizes the need for unprecedented urgent action to avoid the most severe consequences of climate change, with every degree of warming increasing the risk of triggering more tipping points [2] - Accelerated emissions reductions and expanded sustainable carbon removal efforts are essential for rapid cooling [2] Group 3: Positive Transformations - The report suggests a hopeful pathway through the activation of "positive tipping points" that can drive self-reinforcing transformations in social and technological systems [2] - The proliferation of green technologies such as solar energy, wind energy, electric vehicles, and battery storage shows promising signs of change [2] Group 4: Societal Attitudes and Political Will - Public concern about the climate crisis is rising, and actions by early adopters can lead to broader behavioral changes [3] - The need for political courage is highlighted, with calls for inclusive and equitable transformations that benefit all [3]