To determine whether man-made charcoal, or biochar, can significantly cut carbon levels in the atmosphere, large-scale systems need to be tested, according to an NRDC analysis.

Solar cells made with plastic are cheaper to manufacture, but the technology is still seeking out niche applications, such as gadget-charging bags and solar windows.

GM details the EPA fuel economy label for the hybrid Chevy Volt, which will range from 94 miles per gallon equivalent on electric and 37 mpg for gas-only driving.

Biofuel interest wanes while efficiency in size and material, and cleaning the environment takes root as winning trends in the annual contest.

Interior Department says it will work to identify high-priority areas off the Atlantic coast, as well as revise regulations to simplify the leasing process.

Interior Department says it will work to identify high-priority areas off the Atlantic coast, as well as revise regulations to simplify the leasing process.

The Scottish maker of a wave power generator gets investment from Swiss power industry giant ABB and others to commercialize its Oyster machine.

The Scottish maker of a wave power generator gets investment from Swiss power industry giant ABB and others to commercialize its Oyster machine.

SunEdison connects 70-megawatt PV solar farm in Rovigo, Italy to power over 17,000 homes, but is it really Europe's largest?

Rental car giant partners with Coda Automotive to augment its California rental fleet with 100 electric sedans that get up to 120 miles on a charge.