New technologies

Silent Rooftop Wind Turbines Could Generate Half of a Household's Energy Needs

Small wind turbines scaled to the right size for residential and urban areas have so far lived in the shadows of their larger wind-farm-sized counterparts. The power output has been too low for a reasonable return on investment through energy savings and the noise they produce is louder than most homeowners can deal with.

http://offgridquest.com/energy/wind-power/silent-rooftop-wind-turbines-could-gener

For more information check this site

http://www.greenpowerco.com.au/wind-power/archimedes-wind-turbine/