The bigger the rotor blades, the more energy they can capture from the wind. The giant blades (typically 70 m or 230 feet in diameter, which is about 30 times the wingspan of an eagle) multiply the wind's force like a wheel and axle, so even a gentle breeze is enough to make the outer edges of the blades turn around.he same thing happens in a wind turbine, only the dynamo generator is driven by the turbine's rotor blades instead of by a bicycle wheel, and the lamp is a light in someone's home dozens of miles away. Read more in our main article about generators.
The fur trade is a worldwide industry dealing in the acquisition and sale of animal fur. Since the establishment of a world fur market in the early modern period, furs of boreal, polar and cold temperate mammalian animals have been the most valued.
An animal with commercially valuable fur is known within the fur industry as a furbearer. The use of fur as clothing or decoration is considered controversial by some people: most animal welfare advocates object to the trapping and killing of wildlife, and to the confinement and killing of animals on fur farms.