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).
