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Renewables and natural gas would collectively meet almost two-thirds of incrementalenergy demand during 2010-2035 (Figure 3-17).Figure 3-17: Energy sources and global primary energy demandEnergy (mtoe)5,0004,0003,0002,0001,000Additional to 203520100Oil Coal Gas Renewables NuclearFuels(Source: World Energy Organization, 2011)Renewable energy sources are often capital-intensive, representing 60 per cent ofinvestment for 30 per cent of additional generation, but they bring environmental benefitsand have minimal fuel costs (Figure 3-18). Power investments beyond 2011 will focuson low-carbon technologies.Figure 3-18: Share of new power generation and investment 2011-2035403530GenerationInvestmentPer cent2520151050Coal Gas Nuclear Hydro Wind Solar PVEnergy sources(Source: World Energy Organization, 2011)