Figure SPM-1. (WGIII) Emissions of different greenhouse gases 1970-2004

(GreenFacts note: Emissions are expressed in Giga tonnes of CO₂ equivalent per year which scales emissions using global warming potentials (GWPs).

1 Giga tonne = 1 000 000 000 tonnes)

100 year GWPs from IPCC 1996 (SAR) were used to convert emissions to CO₂-eq. (cf. UNFCCC reporting guidelines). CO₂, CH4, N2O, HFCs, PFCs and SF6 from all sources are included.

Source: IPCC Climate Change 2007:  IPCC Climate Change 2007: "Mitigation, Summary for Policymakers" (2007), p4