With winter upon us, a favorite gadget of CNET's Martin LaMonica is a blower door, a green building tool for measuring air flow and finding leaks.

EPA plans to propose so-called performance standards on greenhouse gas emissions on both new and existing plants beginning in July for power plants and for oil refineries by December.

Active Power has created an updated version of its system designed to provide seamless energy backup and tailored it for the IT crowd.

The agency offers $74 million to labs doing research and development, as well as cost analysis projects. Will that be enough to reassure Energy Secretary Steven Chu?

In s surprise move, solar panel maker SpectraWatt says it will shut its new New York plant and lay off workers, blaming softening demand in Europe.

In a surprise move, solar panel maker SpectraWatt says it will shut its new New York plant and lay off workers, blaming softening demand in Europe.

With the loan guarantee, the company can start construction on its 250-megawatt Gila Bend plant, which will be big enough to power at least 75,000 homes.

With the loan guarantee, the company can start construction on its 250-megawatt Gila Bend plant, which will be big enough to power at least 75,000 homes.

Venture investor confidence is on the rise with the consumer Internet surpassing green tech as the sector most likely to get over-invested, according to an industry survey.

Quick return on investment will make building energy management systems popular over next five years, says Pike Research.