Came across this interesting article on Tiny Plastic Wind Turbines that can be placed on rooftops and balconies in crowded cities. Cost very little. These turbines generate electricity which gets stored in cells and can be used to power appliances.
Are such products being installed some place?
What are the costs involved? Installation, maintenance?
Chk out this link :
http://www.treehugger.com/files/2007/03/hong_kong_inven.php