State advantages and limitations in harnessing wind energy.

Explanation

Advantages of wind energy : (1) Wind energy is an environment friendly. (2) It is efficient source of renewable energy. (3) It requires no recurring expenses for the production of electricity.
Limitations in harnessing wind energy :
(1) Wind energy farms can be established only at those places where wind blows for the greater part of a year.
(2) The wind speed should be higher than `15 km//h` to maintain the required speed of the turbine.
(3) There should be some back-up facilities (Like storage cells) to take care of the energy needs during a period when there is no wind.
(4) Establishment of wind energy farms requires large area of land. For a 1 MW generator, the farm needs about 2 hectares of land.
(5) The initial cost of establishment of the farm is quite high.
(6) The tower and blades need a high level of maintenance as they exposed to the vagaries of nature like rain, sun, storm and cyclone.