Wind

Where feasible, wind turbines will be installed. A 2.5kw wind turbine on the roof of a building is capable of producing 4000-6000 kWh of power every year. That's enough electricity to supply the average home with all its domestic electricity requirements (excluding heating).

These turbines starts generating power at wind speeds over 5mph and reach their maximum output in winds of 25mph. In stronger winds the blades of the turbine will twist or 'feather' to allow the wind to pass without increasing the speed of the blades. These turbines have experienced winds of up to 150mph in storms in Scotland, gales in the Falkland Islands and hurricanes in the Caribbean.

In a typical breeze of 10mph the noise emitted at the base of the tower is 40 decibels. In comparison a car passing 10 metres away at a speed of 40mph will produce 60-70 decibels.