The natural wind energy available to humans is a wind energy resource. Wind energy is the kinetic energy generated by horizontal air movement and is a natural resource on the earth. It is essentially derived from the movement of the Earth's atmosphere caused by solar radiation. Therefore, it belongs to a kind of solar energy in a broad sense. It is also attributed to "renewable energy" because of its "recurring and regenerative" characteristics. The distribution of wind energy resources around the Earth depends mainly on the wind speed in the area, and secondly on the air density over the area. In 1981, the World Meteorological Organization published an estimated distribution of wind energy resources worldwide, dividing the world's wind energy resources into 10 grades based on average wind energy density and corresponding annual average wind speed. The high-value areas of wind energy above grade 8 are mainly distributed in the mid-high latitudes of the southern hemisphere and the northern Atlantic Ocean in the northern hemisphere, the northern Pacific Ocean, and the mid-high latitudes of the Arctic Ocean. The wind energy on the mainland generally does not exceed 7 grades, of which the western United States The windy areas of the northwestern coast, the top of the Ural Mountains and the Black Sea region are larger. China's wind energy resources are of medium level in all countries of the world, and the main wind energy resources are distributed in the southeast coast and the northern high plains such as Inner Mongolia and Gansu. (Excerpted from "Encyclopedia of China Resources Science")
The neodymium magnet is used in the motor of a wind turbine. The reason why magnetism can be used for a long time is because the magnet only provides magnetic lines of force during power generation, and does not consume magnetic force. The power is converted from mechanical energy.