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.
A mink farm in Poland. Fur farming is the practice of breeding or raising certain types of animals for their fur. Fur used from animals caught in the wild is not considered farmed fur, and is instead known as 'wild fur'. Most of the worldâs farmed fur is produced by European farmers. There are 6,000 fur farms in the EU. The EU accounts for 63% of global mink production and 70% of fox production.