A significant portion of the world's onshore wind farms are located in the western United States and China. Europe is the leader in offshore wind farms. Most of these are located off the coasts of Belgium, Norway, Ireland and other parts of western and northern Europe.
Wind farms are best constructed in areas with a constant flow of wind. Meteorological data alone does not suffice when planning a wind farm, as site-specific data better accounts for environmental nuances. Areas prone to turbulent winds are not ideal for wind farm construction. The advantages of wind power make it a mostly environmentally friendly source of energy, although flying animals are often caught in the blades of turbines and die as a result. This can negatively affect local populations.