Energy

DOE: Energy Information Administration (EIA)
Section of the U.S. Department of Energy (DOE) providing statistics, data, analysis on resources, supply, production, consumption for all energy sources.
http://www.eia.doe.gov/

DOE: Energy Science and Technology Virtual Library
Collections of scientific and technical information from the U.S. Department of Energy (DOE) with a distributed searching capability.
http://www.osti.gov/energyfiles/

DOE: Office of Science and Technology Information (OSTI)
Access to a collection of scientific and technical information from U.S. Department of Energy (DOE).
http://www.osti.gov/

International Energy Annual (IEA)
Data summary for world energy production, consumption, price and carbon dioxide emissions.
http://www.eia.doe.gov/iea/

Wikipedia: Energy
Free encyclopedia article explaining the scientific notion of energy. Includes units of measure, energy transformation concepts, types of energy, history and uses.
http://en.wikipedia.org/wiki/Energy