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Can renewable energy sources power the world?

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Figure 7 (a) World electricity generation by fuel 1971–2009. (b) Electricity projections in the IEA Reference scenario for 2050; in the IEA Blue map scenario 2050; in the IEA Blue Map High renewables scenario 2050; and in the Greenpeace Advanced Energy (r) Evolution scenario 2050.

 8.2 Comparing International Energy Agency and Greenpeace scenarios