159 countries are past their CO2 peak. Together they emit what they did in 1990.

COP31 opens today in Antalya. Using Global Carbon Project data via Our World in Data (to 2024), this explorer splits 215 countries into past-peak and still-rising groups, lets you redefine peak, and asks you to guess when the US, Japan or Germany peaked. Sources on the page; COP31 dates from Wikipedia (secondary).