A series of recently released studies make it clear that wind power is not going to save us—not from global warming, not from high extinction rates, and not from the system of high-energy-consumption industrial exploitation that is killing the planet.
Let’s start with the most damning findings: even the most large-scale shift to wind power cannot slow greenhouse gas emissions enough to have any positive effect on the climate, although it may manage to make things worse. Why?
A study published in Nature Climate Change in September found that although hypothetically there is enough power in the earth’s winds to sustain current levels of energy consumption, in practice you could never harvest enough energy from wind to affect the climate:
Turbines create drag, or resistance, which removes momentum from the winds and tends to slow them. As the number of wind turbines increases, the amount of energy that is generated increases. But at some point, the winds would be slowed so much that adding more turbines will not generate more electricity. …
[T]he study found that the climate effects of extracting wind energy at the level of current global demand would be small, as long as the turbines were spread out and not clustered in just a few regions. At the level of global energy demand, wind turbines might affect surface temperatures by about 0.2 degrees Fahrenheit and affect precipitation by about 1 percent. Overall, the environmental impacts would not be substantial.
source - http://www.rootforce.org/2013/03/05/why-wind-power-is-a-sham/