1. United Nations, UNFCCC (UN, New York, 1992), Article 3, paragraph 1.
2. UN, UNFCCC (UN, New York, 1992), Preamble.
3. World Resources Institute Climate Analysis Indicators Tool (WRI Washington DC 2012; www.wri.org/project/cait/.
4. United States Energy Information Administration International Energy Statistics (U.S. Department of Energy Washington DC 2012); www.eia.gov/cfapps/ipdbproject/IEDIndex3.cfm.
5. Nordhaus W. D., A Question of Balance (Yale Univ. Press, New Haven, CT, 2008).