Wind energy or wind power tells the process by which wind that is formed due to presssure difference is used to generate electricity. Wind turbines convert the kinetic energy in the wind into mechanical energy . A generator in wind mill can convert mechanical energy into electricity. Mechanical energy can also be utilized directly for specific tasks such as pumping water as mostly used in earlier times...
A good advancement would be a portable radio. They have made life easier for people who are walking/hiking and are looking for something such as the weather for the night or the score for a sports game.
