questions of wind

Some benefits of the wind:

1. Transportation

Wind is used to propel sailboats, hot-air balloon, and aircrafts. Aircrafts can increase their ground speed and cut down the flight time with the help of tail wind.

2. Wind Power

Wind can power wind turbines to generate electricity. Large scale wind farms can generate enough electricity to power many cities.

You can get more info and see some pictures here:

http://en.wikipedia.org/wiki/Wind_power

3. Recreations

Wind figures prominently in several popular sports, including recreational sailing, windsurfing, and kiteboarding. Finally, wind enables the simple pleasure of flying a kite.

http://en.wikipedia.org/wiki/Sailing
http://en.wikipedia.org/wiki/Windsurfing
http://en.wikipedia.org/wiki/Kitesurfing
http://en.wikipedia.org/wiki/Kite_Landboarding