Wind energy The energy of wind is harnessed with wind turbines. They are usually grouped in wind farms (sometimes called wind parks ). There are onshore farms (which, however, are often near water); nearshore farms (on land or on sea within several km of a coast); and offshore parks (ten km or more from land). Wind energy currently generates only 1% of all electricity on a global scale, but its share is growing rapidly. In Denmark, for example, wind already accounts for 19% of the total electricity production. Since wind is intermittent, turbines can’t constantly work at their full capacities. The ratio of actual annual productivity to the theoretical maximum capacity is called capacity factor . It typically reaches 20% to 40%. World leaders in wind energy use: Germany, USA, Spain, India