Green Tech

Living in a dense urban environment, I appreciate the practicalities of a small car. While testing the i-Miev, I had no qualms about driving it home every night, knowing that parking would not be much of an issue.

But with only 63 miles range, making it back and forth might have become a problem, except for the fact that San Francisco is only about seven miles wide. As the road distance of my commute comes under five miles, the i-Miev's range was more than adequate.

Sounds like the i-Miev would be the perfect car for my lifestyle, but my … Read more

While most auto manufacturers are focusing their attention on the news and new models being revealed at the New York International Auto Show this week, BMW is setting its sights on the Beijing motor show, where it will debut the latest addition to the i family of vehicles.

The BMW i8 Concept Spyder is a topless two-seater version of the i8 coupe, and will make its first appearance at the Beijing motor show later this month. Slightly shorter than its 2+2 sibling, the Concept Spyder makes generous use of the carbon fiber reinforced plastic used in the LifeDrive architecture, … Read more

Photos of Fisker Automotive's Atlantic luxury plug-in electric are online a day before the company officially unveils the car in New York.

Called Project Nina, the four-door sedan is expected to have the same powertrain as the Fisker Karma (and Chevy Volt) -- the car is driven by an electric motor and a gas engine kicks in to maintain sufficient charge on longer rides.

Fisker is hosting a "reveal" event for the Atlantic tomorrow night in New York, where there will certainly be questions about the company's future.

The company suffered delays in bringing out the … Read more

A story from FuelCellToday shows how Honda has turned the FCX Clarity into a zero emissions electric generator on wheels. The auto manufacturer outfitted the hydrogen fuel cell vehicle with a mobile power supply system, enabling the car to provide 9 kilowatts of electricity continuously for more than seven hours on a full tank of hydrogen at peak generation. At the lower-generation rates needed to power a typical home in Japan, the FCX Clarity could provide electricity for six days.

Nissan and Mitsubishi also have vehicle-to-home power systems, albeit with smaller energy capacities. These systems can be used in emergency … Read more

How do you feel when you're tossing food into the garbage or the waste disposal?

Do tinges of guilt bubble in your throat? Does a soupcon of self-loathing slither around your brain, as you pour that curried cauliflower soup into an unknown beyond?

I bring you news that might assist your psychological health. For just this week, some British people from a clean-tech company called SeaB have been sliding around the Bay Area, trying to get our eco-princes to invest in MuckBusters.

These artfully named objects are containers into which you can shove your leftover spaghetti, tacos, or duck a l'orange and expect, after a little technical machination, to get electricity.

If you believe the estimates, all you need is half a ton of unwanted food to run about 150 computers. Which presents a sobering counterpoint to the impression one has that 150 people sitting at computers in the average office consume at least 150 tons of food.

Some will be wondering how this machine busts your meatballs. Well, you shove your food in at one end and it gets chewed up by bacteria. As often with chewing, a lot of gas emerges. Your friendly MuckBuster does a little filtering, gets itself a methane stream and then slips that gas through a heat and power system. … Read more

We Americans aren't the only ones who have gained weight. Over the past 25 years, our cars have gotten heavier too, says Amory Lovins.

Lovins, chief scientist of the Rocky Mountain Institute, says he believes that ultralight materials like carbon fiber composites can make cars simpler and cheaper to build. At the Cleantech Forum in San Francisco this week, Lovins talked about strategies to make oil-free automobiles.

This video originally appeared on SmartPlanet with the headline "Amory Lovins: Carbon fiber cars would cut oil dependency."

More SmartPlanet links

General Motors may have had to slow production of the Chevy Volt in the U.S. due to low demand, but it's flying out the door of dealerships in Europe.

The Opel Ampera, the European version of the extended range hybrid, went on sale in Europe in February, and has already received more than 7,000 orders, according to a Digital Trends article. That's almost as many plug-in hybrids the automaker sold in the U.S. all of last year.

Chevy sold 7,671 Volts in 2011 and 1,023 units last month in the U.S. In … Read more

Startup Altaeros Energy is going up for more energy.

The company yesterday said it has successfully tested a prototype of its airborne wind turbine, which is a traditional small wind turbine enclosed in an inflatable shell. The Boston-based company is seeking to partner with others to build and test a commercial-scale turbine.

Altaeros Energy is one of a few companies developing systems to capture the stronger and steadier winds at high altitudes. Others include Makani Power, Joby Energy, and Windlift.

For its prototype test in Maine, Altaeros Energy placed a Southwest Skystream turbine, which is normally placed on a pole, … Read more

It's a flying wing, a power generator, and a robot.

Startup Makani Power is developing a wind turbine that's a big break from convention. If it works, it could slash the cost of wind power, particularly offshore.

The company has nearly finished testing flights for a 30-kilowatt prototype turbine and will soon begin work on a larger, commercial-scale system, according to CEO Corwin Hardham. The goal is to complete development and testing that full-scale, 600-kilowatt system by 2016, he said.

Makani Power, which was originally funded by Google and later by the Department of Energy's ARPA-E agency, … Read more