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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.

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CO2 Emissions vs IPCC Scenarios

International Energy Agency (IEA) fossil fuel CO2 emissions data (black) compared to IPCC Emissions Scenarios (colors).  The IPCC Scenarios are based on observed CO2 emissions until 2000, at which point the projections take effect.  We are approximately on track with Scenario A2 from the IPCC Special Report on Emissions Scenarios (SRES).  Data sources: IEA CO2 emissions up to 2010 (2011 is 30.2 Gt, 2012 is 30.6 Gt); IPCC SRES data (Excel spreadsheet).


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