The newly approved Cape Wind project in Massachusetts will be closely watched, by both supporters and detractors, as it goes forward. Many see it as a barometer for the future of offshore wind energy in the US.
The Interior Department has approved the Cape Wind project, clearing the way for the first offshore wind power in the US.
President Obama Friday told federal agencies to cut energy use to reduce greenhouse-gas emissions by 28 percent by 2010. Agencies are taking measures ranging from using more solar energy to switching from gasoline vehicles to hybrid vehicles.
Four technologies aim to use heat from the sun to make electricity. But which one has the edge?
Rather than replace coal-fired boilers, one university opts for an ambitious geothermal system.
Pricier options may become obsolete if government requires utilities to bring more renewables on line.
Long-promised cellulosic ethanol is in modest production, but hurdles remain.
The US is a late entry, but new domestic projects are revving to go.
Some predict that within five years, it could rival fossil-fuel energy.
The agency has developed a Google Earth mashup that pinpoints potential sites for solar, wind, and biomass projects.