Global warming potential (GWP)

A GWP is a measure, defined by the IPCC, of the relative effect of a substance in warming the atmosphere over a given period (100 years in the case of the Kyoto Protocol), compared with a value of one for carbon dioxide.  Methane’s GWP (for instance) is 21.

All six greenhouse gases are put together in the same basket for accounting purposes, weighted by their respective global warming potentials (GWP).

Related topics

UNFCCC

Kyoto Protocol