In the busy field of building energy software, startup Noesis Energy will try to give away its software and build a community willing to pay to see how different efficiency projects perform.

We've already seen AMD's Bulldozer architecture come up short in the performance benchmarks. However, the company also claims it made important improvements to power consumption. Can FX-8150 at least score some points in the energy efficiency department?

To make a "black silicon" that can absorb more light, Harvard spin-off SiOnyx introduces a laser texturing treatment to turn up solar cell efficiency.

Social networking meets energy efficiency in Facebook app done with Opower and the National Resources Defense Council (NRDC) that lets people compare energy use to friends and the national average.

A research paper finds the electrical efficiency of computers doubles roughly every year and a half, which is what made laptops, smartphones, and tablets possible and what opens up possibilities for networks of wireless sensors.

The first fuel-economy standards for medium and heavy-duty trucks aim to improve efficiency by about 20 percent by 2018, saving about $50 billion on fuel costs largely by using existing technologies.

LED light source maker Bridgelux expects to start making LED chips on silicon wafers in about two years, a technology transition meant to cut LED lighting costs.

A prototype bulb has an efficiency, as measured by lumens per watt, that is more than double commercial CFLs and LED bulbs available today.

The U.S. government has a deal with 13 automakers to increase fuel efficiency to 54.5 miles per gallon (4.3 L/100 km) for cars and light-duty trucks by 2025, President Barack Obama announced Friday.

The diamond-like material could help farmers save money on fuel and increase the quality of their soil

Company says a test cell using its cadmium telluride solar technology set a new world record of 17.3 percent efficiency.

Amendment to spending bill has an uncertain fate, debatable legality