Wind power or wind energy is the use of wind turbines to generate electricity. A wind turbine is a device that converts the wind's kinetic energy into electrical energy. The amount of power that can be harvested from wind depends on the size of the turbine and the length of its blades. The output is proportional to the dimensions of the rotor and to the cube of the wind speed. Theoretically, when wind speed doubles, wind power potential increases by a factor of eight. Onshore wind is a proven, mature technology with an extensive global supply chain. Onshore technology has evolved over the last years to maximise electricity produced per megawatt capacity installed to unlock more sites with lower wind speeds. Wind turbines have become bigger with taller hub heights, and larger rotor diameters. Today’s new onshore wind power projects have turbine capacities of about 2 MW. Global installed capacity of onshore wind in 2020 was nearly 700 GW. Capacity additions increased an unprecedented 108 GW, twice as much as in 2019. To attain the 8 000 TWh required in 2030 under the Net Zero Emissions by 2050 Scenario of the IEA, it iso necessary to raise annual capacity additions to 310 GW of onshore wind.