1. U.S. Energy Information Administration. Table 12.1. Carbon Dioxide Emissions from Energy Consumption by Source. InMonthly Energy Review April 2010;Solomon, S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K. B., Tignor, M., and Miller, H. L., Eds.http://www.eia.doe.gov/mer/pdf/pages/sec12_3.pdf(accessed Sept 2010) .
2. Kenny, J., Barber, N., Hutson, S., and Linsey, K.Estimated Use of Water in the United States in 2005.U.S. Geological Survey, 2009; http://pubs.usgs.gov/circ/1344/pdf/c1344.pdf(accessed Sept 2010).
3. IPCC.Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change;Solomon, S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K. B., Tignor, M., and Miller, H. L., Eds.Cambridge University Press:New York.http://www.ipcc.ch/publications_and_data/ar4/wg1/en/contents.html(accessed Sept 2010) .
4. Spencer, T. and Altman, P.Natural Resources Defense Council. Climate Change, 2010.Climate Change, Water, and Risk: Current Water Demands Are Not Sustainable.http://www.nrdc.org/globalWarming/watersustainability/files/WaterRisk.pdf(accessed Sept 2010).