The natural movement of air in horizontal currents. Distributions are maps of wind climatology and observations of wind speed, direction, and variability in the lower atmosphere as a function of location, time, or elevation. Assessments evaluate the potential, profitability, and risks of generating wind energy, as well as the effects of wind on uses other than energy generation, such as transportation or offshore structures. Predictions are the results of models or projections of future wind climatology and wind assessments; these data include predicted changes due to economic, regulatory, technological, and environmental changes.