This site, created by the U.S. Department of Energy, provides information and tools related to alternative energy, including biodiesel, electricity, ethanol, hydrogen, natural gas, and propane.
The ECD searches over 2 million documents in fields related to energy, including chemistry, physics, materials, environmental science, geology, engineering, mathematics, climatology, oceanography, and computer science.
Managaed by the Groundwater Protection Council, FracFocus iprovides information on hydraulic fracturing, including its "Find a Well" map-based search mechanism.
Provides a ton of information about energy and related topics such as energy security, market information, and information for homeowners and industry.