Opower embraces big data to lower your utility bill

You want to save money. Utilities want you to conserve energy. Middle-man Opower thinks it can satisfy everyone with a brand-new platform designed to get people excited, yes excited, about energy conservation.

SolarReserve pulls in $586M for South African clean-energy projects

SolarReserve, a U.S. based solar energy developer has succeeded in closing a $586 million equity and debt round of financing for two South African clean-energy projects.

Tesla’s Model S named first electric car to get Motor Trend’s top honors

Tesla's Model S has been named Motor Trend's car of the year -- the first electric car to get the nod in Motor Trend's 64-year history.

Clean-tech company View pulls the curtain off the future of glass

After five years of research and development, View reveals its smart windows that automatically adapt to outside conditions.

Tesla reaches ‘turning point,’ promises mass production for 2013

Although it made only a few hundred cars in the third quarter, Tesla says its production facilities have reached a turning point and are now able to produce 20,000 or more cars per year.

Clean-tech startup LightSail pulls in $37.3M from Bill Gates, Peter Thiel

LightSail has earned some heavyweight support from both venture capital firms and angel investors, including Microsoft co-founder Bill Gates.

AutoGrid pulls in $9M to turn ‘big data’ into an energy source

AutoGrid, a Bay Area-based startup founded in 2011, pulled in $9 million to develop its "big data" technology to help utilities and businesses control their energy usage.

Light show, anyone? Apple Stores start stocking $199 Philips Hue custom LED light kits

The Nest learning thermostats aren't the only smart device for the home available in Apple Stores. The retail chain will soon begin selling Philips' 'Hue' LED light bulb kits, which let you control the color of light in your rooms from your smart device.

Tata Nano: The $3,500 car with 37 HP and a 4-gallon gas tank is coming to the U.S.

The Tata Nano has never really taken off in India. Perhaps that's because it's perfect for the U.S. market.

Austin-based Calxeda pulls in $55M to ‘slash data center power’

Calxeda, the Austin, Tx-based company with the first ever chip capable of running an entire server at a mere 5 watts, just announced a $55 million fundraise.

Today, birdwatching. Tomorrow, saving the entire planet!

Birdeez is an iPhone app that makes it "ridiculously easy," in the words of cofounder Jeff Simeon, to identify birds and then share your sightings on Twitter.

H2Tran’s disaster-proof server enclosures are eco-friendly — and awesome-looking (gallery)

Making servers able to withstand hurricanes, floods, fires, and earthquakes can be an eco-friendly task.

Who’s the greenest of them all? With Sure points, you can count your eco-friendliness

It's not easy being green, Kermit the Frog sang. A startup called Sure has a way to make it easier: Give people points for making green lifestyle choices.

iPhone 5 beats Samsung Galaxy S3 in toxicity tests

Want some lead, mercury, or chlorine with your new iPhone 5 or Galaxy S3? You're in luck: both phones contain those and many other toxic substances.

From Iceland with green: GreenQloud launches world’s first completely eco-friendly cloud computing center

According to a 2007 Gartner study, the IT industry produces as much greenhouse gas as the entire aviation industry. That's one of the reasons Eiki Hrafnsson and Tryggvi Lárusson created GreenQloud, the first public cloud fully powered by 100 percent renewable energy resources.

The new Nest smart thermostat is slimmer, compatible with 95% of systems

After launching the incredibly polished Nest Learning Thermostat last year, you'd think there wasn't much room for improvement -- but you'd be wrong.