Wind turbines are slightly bad in that, they deplete the wind. Some back of the envelope calculations later and we realize that the total hypothetically available wind power in the world is &lt;&lt; The human demand. A hurricane depletes some 500 Gigawatts, but that's just 1/20th the total world power demand, and the total wind power of the world can't be significantly greater than that, or the world would essentially be a giant storm.