and has an extremely good energy balance. The calculations on just how much CO2 could be saved by wind energy is based on an assumption for the carbon intensity of the global electricity sector, i.e. the typical amount of CO2 emitted by producing one kWh of power. Individual countries’ emissions differ substantially, but here we use the IEA’s estimate of 600g/kWh as an average value for the carbon dioxide reduction to be obtained from wind generation.