Using Magnetic Levitation In Wind Turbines

Today, I wrote a post for TreeHugger about a company that is proposing to build a colossal magnetic levitation wind turbine. Magnetic levitation (or maglev) is an interesting technology that has been around for a while.

High Speed Trains For The U.S.

We are exchanging post with the Ecotality blog today. This post looks at Europe’s expanding high speed rail systems: While America’s leaders fiddle around and our rail seems to go down in flames, Europe is strengthening its rail system. Two interrelated items to consider: High-Speed Trains are expanding in Europe and are cutting travel times, […]

Electric Tankless Water Heaters

Note: This post has been expanded and updated for 2009! Tankless water heaters only heat water when it is needed. About 8% to 30% of the energy consumed by a standard water heater goes to keeping the water hot while it’s not being used. New tankless systems heat the water instantly when you turn on […]