Amid increased scrutiny of the loan guarantee program because of Solyndra, the Energy Department finalizes four more loans for projects which will lead to a jump in U.S. solar power production.

Short of going full hybrid, automakers are employing a number of technologies to improve fuel economy. These range from turbocharging an engine, to improving the transmission, to electrifying specific components. CNET looks at 11 of these technologies.

Originally posted at The Car Tech blog

Stirling Energy Systems, which once had giant utility contracts, files for bankruptcy amid a price war and technology shift away from solar thermal and toward photovoltaics.

Stirling Energy Systems, which once had giant utility contracts, heads to bankruptcy amid a price war and technology shift away from solar thermal and toward photovoltaics.

Government researchers say they've successfully engineered a substance called bisabolane into a biosynthetic alternative to diesel fuel.

With funding for the government's loan program set to expire at the end of the week, investors have been watching to see what deals will be completed before time runs out.

Investor Steve Jurvetson is bullish on green innovation because entrepreneurs can tap into the rapid advances in genetic engineering and IT.

DOE guarantees $350 million loan to Ormat Technologies for three more power plants in the state.

A $75 million investment via Clean Power Finance will help homeowners install solar panels owned by Google, getting solar-generated electricity for a monthly fee.

Simbol Materials opens an operation in California to extract lithium, zinc, and other metals for batteries from the discharge of geothermal plants.