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U.S. Energy Information Administration (2007) Renewable Energy Consumption and Electricity Preliminary 2006 Statistics (Washington, DC: U.S. Energy Information Administration, August); available at: . U.S. Environmental Protection Agency (EPA) (2009) Frequently Asked Questions about Global Warming and Climate Change: Back to Basics (Washington, DC: EPA, April); available at: . World Bank (2008) World Development Indicators 2008 CD-Rom (Washington, DC: The World Bank). World Resources Institute (WRI) (2003) “Earth Trends, Country Profiles, Energy and Resources: Sri Lanka” (Washington, DC: WRI); available at: .