IPCC Fourth Assessment Report: Climate Change 2007
Climate Change 2007: Working Group III: Mitigation of Climate Change
4.19

Figure 4.19: GHG emissions for alternative electricity-generation systems.

Notes: 1 tCO2 –eq/GWh = 0.27 tC –eq/GWh. The high estimate for hydro includes possible GHG emissions from reservoirs (Section 4.3.3.1)