Renewable energy sources could account for nearly half of the increase in global power generation through 2035, according to the International Energy Agency's (IEA) 2013 edition of the World Energy Outlook. Wind energy and solar energy could make up 45% of that expansion in renewables. The report, released on November 12, also found that a renewed global focus on energy efficiency is taking hold and is set to deliver multiple benefits. The IEA report noted that China is expected to see the biggest absolute increase in generation from renewable sources, more than the increase in the European Union, the United States, and Japan combined. In terms of trends in energy efficiency, the IEA found that potential for energy efficiency is still far from exhausted: two-thirds of the economic potential of energy efficiency remains untapped. The report presents a central scenario in which global energy demand rises by one-third through 2035. The shift in global energy demand to Asia gathers speed, but China moves towards a back seat in the 2020s as India and countries in Southeast Asia take the lead in driving consumption higher. At the same time, North America's demand for crude oil imports all but disappears by 2035 and the region becomes a larger exporter of oil products. See the IEA press release and the executive summary.