Editor's note: Yes, we're bringing on the new writers! Alex Ho is the latest to join the group. Alex blogs regularly at Generation Exe, and lives in the Bay Area. He'll be covering the green tech field for us.

The BMW Hydrogen 7 Series Sedan is not currently available for purchase, but I am sure it will be eventually. It has started a limited production run and will currently only be made available to influential public figures such as Al Gore and Arnold Schwarzenegger. It has a V-12 engine that produces 260 horsepower. What makes this car great is that when it is running on hydrogen, it releases zero emissions as the hydrogen fuel just releases water vapors.

Since there are currently only a limited amount of hydrogen refueling stations, the engine is designed to run on either hydrogen or gasoline. There are two fuel tanks located at the rear of the car: one holds 17.5 lbs of liquid hydrogen while the other holds 16 gallons of gasoline. A filter pipe for the hydrogen is constantly chilled to -418 F degrees. In order to keep the gas cold, a special material 30 mm thick insulates as well as a 56 foot thick styrofoam panel. The driver can easily switch between the two by pressing a button on the steering wheel. The hydrogen can power the car for 123 miles while 300 miles can be driven with the gasoline.

The BMW Hydrogen 7 has gone through numerous development and testing processes including performance testing at the Nurburgring tracks in Germany, the heat of Death Valley, and the chilling cold of the Polar regions.

Here is a link to read more about the car. Here is a video from BMW on the Hydrogen 7.