A peer-reviewed study in Nature quantifies something economists have long argued: the US, as history's largest cumulative carbon emitter, has caused $10 trillion in global economic damage since 1990. The research is rigorous and well-sourced — it's published by established climate scientists and cited by economics experts. The article does clearly frame this as an argument for reparations-style climate finance, which is the legitimate policy debate behind it, though it notes some economists argue the study may still undercount harm to poor countries since losing a dollar hits them harder than it hits wealthy nations.