This lecture covers the origin and gross potential of wind energy, including the large-scale movement of air mass in the atmosphere due to solar heating. It explores the conversion of solar energy into kinetic wind energy and the impact of Earth's rotation on wind circulation. The presentation delves into the Coriolis effect, jet streams, and wind speed distribution models. Additionally, it discusses the Weibull probability density function for wind speed estimation and the global wind power potential, emphasizing the growth of wind energy capacity worldwide.