A one kilowatt wind turbine for your backyard

treehugger.com — At 30 feet tall and 2 feet wide, the propeller-less design is bird-safe, relatively quiet -- it produces about 25 decibels of noise at five feet, roughly equivalent to the average noise of a residential neighborhood at night -- and doesn't take much breeze to get it spinning; it fires up at 8 mph. It costs $4000 Sep 8, 2007 View in Crawl 4