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A. The energy output of a wind turbine depends on the turbine¡¯s size and the wind¡¯s speed at the turbine height. Wind speed is the crucial element in projecting wind energy system performance. A site¡¯s wind speed is measured through a wind resource assessment prior to a wind system¡¯s construction. Generally, annual average wind speeds greater than six meters per second (m/s) or 14 miles per hour (mph) are required for large-scale wind systems.