China and the United States are the biggest emitters in the world

Total emissions (in million tonnes of CO2) and emissions per capita (in tonnes per capita) in a selection of countries and the EU, 2019.

Only CO2 emissions from combustion and cement production are considered here. The figures therefore do not take into account all emissions. For this reason, the figures for Switzerland are lower than those provided by the Federal Office for the Environment.
Source: Global Carbon Atlas Get the data
swissinfo.ch