World final energy consumption by source 2005 nuclear 2.5% other 3.6% hydro 2.6% combustible renewables&/ waste 44.5% natural gas 18.8% 14.9% Source: IEA(2007)World final energy consumption by source 2005 oil 44.5% coal 14.9% natural gas 18.8% combustible renewables & waste 13.1% hydro 2.6% other 3.6% nuclear 2.5% Source: IEA (2007)