CO2 equivalent (CO2e) greenhouse gas (GHG) emissions is a term to represent the total warming effect of various greenhouse gases compared to that of carbon dioxide.

CO2e is used to compare the emissions of different greenhouse gases in terms of their global warming potential over a specific timeframe.

This allows for a more accurate measure of the total warming (or cooling) effect of a mixture of GHGs emitted (or removed) by a particular source (sink).