1. World Energy Consumption, 1970-2020.  Sources: History: Energy Information Administration (EIA), Office of Energy Markets and End Use, International
    Statistics Database and International Energy Annual 1997, DOE/ EIA-0219(97) (Washington, DC, April 1999). Projections: EIA, World Energy Projection
    System (2000).

2. Energy Consumption in the Developing World, 1995-2020.  Sources: 1995-1997: Energy Information Administration (EIA), International Energy Annual 1997,
    DOE/EIA-0219(97) (Washington, DC, April 1999). Projections: EIA, World Energy Projection System (2000).

3. UNEP Offshore Oil and Gas Environment Forum
    http://www.natural-resources.org/offshore/background/bgnote.htm

4. United States Department of Energy, National Energy Technology Laboratory (NETL)
    http://www.netl.doe.gov/fireintheice/main.html