The President faces a divided Congress, but has some powerful tools to limit carbon emissions.
Peter Thiel leads investment round for compressed-air energy storage startup
Best Buy's Insignia LEDs cost less than half what similar bulbs cost two years ago, and smartphone-controlled bulbs are becoming available.
Sales of the car have improved, but not enough to turn the tide for advanced battery factories in the United States.
Smart grid technologies can make the grid to recover quicker from storms, as utility Pepco is finding out.
Global warming changes precipitation patterns, making some areas drier, and some far wetter.
Philips' Hue wireless LED light bulbs can be controlled via a smart phone or tablet.
Using data analytics, startup AutoGrid Systems seeks to make sense of and monetize the streams of data from smart meters and sensors.
Startup Cool Planet Energy Systems signs on Google to test its biofuel, which is able to meet California's upcoming low-carbon fuel standard.
Greenwave Reality's LEDs can be controlled from a smartphone. Will they sell because they're cool or because they can save energy?