Study: 4°C Warming Could Shrink Global Economy by 40% by 2100

A new study indicates that a 4°C rise in global temperatures could result in a 40% reduction in global economic output by the end of the century. This estimate is significantly higher than previous models, which suggested an 11% loss. The revised projection accounts for interconnectedness within global economies through trade and supply chains, revealing that climate-related disruptions in one region can trigger cascading effects worldwide. The research highlights that economic damages accelerate beyond a 1.7°C rise, advocating for stricter emissions cuts to align with the Paris Agreement's goals. The World Meteorological Organization confirmed 2024 as the warmest year on record, exceeding the 1.5°C threshold.