New research published in Nature estimates that emissions from the United States have contributed to more than $10 trillion in climate-related economic losses worldwide since 1990. By linking rising global temperatures to national emissions, scientists found that decades of fossil fuel use have driven extreme heat, droughts, and reduced productivity across many regions—slowing economic growth on a global scale. The US ranks as the single largest contributor to these damages, reflecting its historically high carbon footprint.
The impacts, however, are not evenly shared. Lower-income countries—despite emitting far less—have faced some of the most severe economic setbacks due to climate change. Nations such as India and Brazil have experienced hundreds of billions of dollars in losses, while a significant portion of the damage has also occurred within the US itself. Researchers caution that the true cost is likely even higher, as future and long-term effects of past emissions continue to unfold, strengthening arguments for climate accountability and financial support for vulnerable nations. More