The Canadian startup Magenn Power has started testing its airship-based wind turbines. The Magenn Power Air Rotor System, or MARS, consists of a blimp-like device that is tethered to the ground, and rotates about its horizontal axis in the breeze. This action generates electrical energy, which is sent down the tether to a transformer, and eventually routed through to the grid.

I've seen hand-held solar chargers before—the Solio immediately comes to mind—but I've yet to see a functional wind-powered hand-held charger. Enter the HYmini. It's palm-sized, comes in three colors, costs 50 bucks, and can charge your gadgets with nothing but a stiff breeze. Well, almost. While it's a welcome idea, on closer inspection, the feature set isn't all we'd like it to be.

In 2007, registrations of new hybrid vehicles jumped by 38 percent to 350,289 vehicles, according to a new report from R.L. Polk & Company. Gee, I wonder why? Maybe it's got something to do with rising prices at the pump, or climate change. Or maybe there's something bigger at play.

Hardly a week goes by these days without a new solar panel technology development in the news. You would think the country was plastered in solar sheets with all the work currently being done. Let's hope the stories soon turn to how we're going to make this all affordable enough to support widespread installations. In the meantime, today's innovation.

If you've been following our recent series of articles on solar cells, you've likely noticed the focus falls roughly into two categories: how to make the panels thinner, lighter and more flexible; and how to make the cells more efficient.

We've been talking a lot lately about new designs in solar panel technology. Today's panels divide into two groups: the old-school silicon and glass box and the newly emerging thin film solar sheets, now being offered by several companies. What we haven't yet looked at is how the thin film technology can be used to make a solar installation that isn't staid and wholly utilitarian. Enter Teresita Cochran, a graduate of both Rhode Island School of Design and New York University's Interactive Telecommunication Program.

The concept of harvesting the ocean as an energy source is nothing new, but in practice it's rarely utilized. That's beginning to change, though. This week, the first major underwater turbine was installed in Northern Ireland's Strangford Narrows—a body of water known for its fierce currents. SeaGen's twin blades measure 52 feet wide, and instead of intermittent winds, this green electricity generator will rely on the ever-changing tide to produce power for around 1,000 homes. Built by Marine Current Turbines, it will be operational this summer.

A new player has stepped into the middle of the Cape Cod offshore wind farm debate, proposing a technological solution that may finally bring the long-running fight to an end. Blue H, a subsidiary of a Dutch company, has proposed the installation of 120 floating wind turbines that would be anchored far from shore and, more importantly, out of sight. Cape Wind, the company that first proposed an offshore wind farm in the area, wants to use standard turbines. But those with beachfront property in the area don’t want their lovely views of the seascape ruined by the spinning blades.

One common complaint about wind turbines is that they blemish the scenic countrysides and coastlines where they perch. Now an architect in London has an attractive solution. The “wind dam,” a giant swath of fabric connected to a turbine, looks more like a Christo art installation than a power generator.

Certain parts of a car’s engine can reach temperatures in excess of 1,500°F. With this in mind, the engineers at BMW developed a way to boost efficiency: Transform that otherwise wasted heat into energy the engine can use. The resulting Turbo- steamer reclaims more than 80 percent of the heat lost from the engine’s exhaust and cooling systems. It uses this surplus heat to generate steam that helps drive the engine. It boosts power and torque by 10 percent and cuts fuel consumption by 15 percent without using a single additional drop of gasoline.