Will fuel cells provide power and heat for homes? Jackie Autry of Palm Springs, Calif., installs fuel cell, which she chose over solar panels for cleaner, on-site energy.

The PowerBuoy is about 150 feet from top to bottom with most of the structure under water, a design said to minimize the environmental impact.

Steam generated in a glass house by mirrors will be used for enhanced oil recovery in California, where steam is pumped underground to draw more from existing wells.

Home automation equipment can help people save energy by cutting down on waste. But CNET's Martin LaMonica finds that if you're already an energy miser, technology doesn't necessarily buy you much.

Home automation equipment can help people save energy by cutting down on waste. But CNET's Martin LaMonica finds that if you're already an energy miser, technology doesn't necessarily buy you much.

Silver Lake Kraftwerk, funded by Silver Lake and Soros Fund Management, is a newly created fund to invest in clean energy technology companies that need growth capital to scale up.

SustainAbility.com issues report card on leading corporate green lists, many criticized for lack of transparency and quality control.

N.J. county's unique solar-financing program seems to be working with 19 solar-energy systems in place within eight months, one of them at Mennen Arena.

Phononic Devices and Alphabet Energy attract investment from VCs and the military for semiconductors that efficiently convert waste heat into electricity.

Final regulations on cutting air pollutants such as mercury and soot at heavy industrial boilers are more flexible than the proposed regulation.