The tiny Smart fortwo EV is making its way to U.S. dealers, and the company says you can buy or lease the vehicle with or without the battery.

At 130 megawatts, the U.S. military is using a lot of solar power – but a new industry report highlights the huge amount that will come in the next several years.

A 173-foot-long blade breaks off a Siemens wind turbine at a Southern California wind farm, leading the company to curtail operations worldwide.

The flights stretch on for 18 hours or more. So what does the Solar Impulse pilot do when he has to, you know, go?

Goldman Sachs will pump $500 million into SolarCity solar lease projects, backing 110 megawatts in installations.

Solar’s proportion of new generating capacity plunged in April. But don’t worry. Everything is OK.

A Japanese company will apparently give hybrid wind-and-tidal energy a go with a device employing Darrieus and Savonius turbines.

If fuel-cell vehicles are ever going to get anywhere, they’ll need places to fuel up, and the public-private H2USA initiative is aimed at developing the infrastructure.

The solar-powered Solar Impulse airplane has drawn big crowds to see it in Phoenix, where it will stay until at least May 20 before resuming a cross-U.S. trip.

Elon Musk and David Sacks quit the Zuckerberg-founded FWD.us lobbying group after pro-pipeline and pro-drilling ads raise a ruckus.