Wind is produced as a result of giant convection currents in the Earth's atmosphere, which are driven by heat energy from the Sun.
This means that wind is a renewable energy resource providing kinetic energy - as long as the Sun exists, the wind will too.
Wind turbines use the wind to drive turbines directly.
They have huge blades mounted on a tall tower.
The blades are connected to a 'nacelle', or housing, which contains gears linked to a generator.
As the wind blows, it transfers some of its kinetic energy to the blades, which turn and drive the generator.
Several wind turbines may be grouped together to form a wind farm.