Windmill farms are popping up all over the globe. While they do provide an alternative and more sustainable approach to generating power, they remain a very mass solution. As such, personal windmills are taking off. The swift wind turbine is one of the more innovative designs because of its ultra-quiet and unobtrusive design. A ring surrounding the rotary blade helps cut wind resistance helping reduce the noise to a mere 35 decibels, about the same as a whisper. It can produce 2000kwh of power annually. A very sustainable solution on an individual level.
 
via inhabitat