intensity among countries remain significant. In 2004,
UNFCCC Annex I countries held a 20% share in world population,
produced 57% of the world’s Gross Domestic Product based on
Purchasing Power Parity (GDPPPP) and accounted for
46% of glo-
bal GHG emissions (Figure 2.2). {WGIII 1.3, SPM}
2.2 Drivers of climate change
Changes in the atmospheric concentrations of GHGs and aero-
sols, land cover and solar
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