Many states now require that part of their energy production come from renewable sources. In most cases, wind, as one of the lowest-cost renewable energy sources, is the primary beneficiary. Utilities as well as policymakers are continuously surprised by the public's positive response to the availability of this green power. Ultra-light Wind Eagles, some of the most effective wind turbines yet. Though wind energy is now more affordable, more available, and pollution-free, it does have some drawbacks.
Wind power suffers from the same lack of energy density as direct solar radiation.
But wind turbines cannot be erected everywhere simply because many places are not windy enough for suitable power generation. When an appropriate place is found, building and maintaining a wind farm can be costly. If the interest rates charged for manufacturing equipment and constructing a plant are high, then a consumer will have to pay more for that energy. Fortunately, the more facilities built, the cheaper wind energy is. Bird fatalities on wind farms are a concern.