This is never talked about by the "green" Do you know what? The two-megawatt wind turbine consists of 260 tons of steel, which requires 300 tons of iron ore and 170 tons of coking coal to produce. All of this is mined, transported and produced using fossil hydrocarbons. A wind turbine can spin until it falls apart, but it will never generate as much energy as was invested in its construction, let alone generate additional energy. For vertical and horizontal wind turbines, the efficiency is approximately the same. For vertical it is 20-30%, for horizontal 25-35%. Some manufacturers increase the efficiency of vertical wind turbines up to 15% by replacing bearings with permanent neodymium magnets. But such a slight increase in efficiency of only 3-5% leads to a significant increase in the cost of structures (https://bit.ly/3x8MNu1).