Wind energy is nothing new
People have been using it since ancient times
Ancient mariners used sails to capture the wind and ensure a comfortable transportation vehicle. Farmers used to use windmills to grind grain and pump water. Today, in turn, increasing numbers of people are using wind turbines, the number of which has been increasing by more than 25% per year. Still, despite the increasing use of wind energy, it still represents a small part of the energy resources that are extracted in the world.
Most wind energy comes from turbines that can be at the height of a 20-story building, with vanes that are 60 metres long. The turbines look like enormous aeroplane propellers stuck on a stick. The wind turns the vanes that, in turn, turn the shaft that is connected to the generator that produces electricity. Wind turbines with other structures use the same principle, only the way in which the wind is captured being different.