According to the U.S. Energy Information Association, world energy consumption is expected to grow by 56 percent between 2010 and 2040, from 524 quadrillion British thermal units (Btu) to 820 quadrillion Btu. Most of this growth will come from non–Organization for Economic Cooperation and Development (non-OECD) countries, where demand will be driven by strong economic growth, changing demographics and urbanization.