Wind energy is one of the oldest forms of energy. In the olden days, this energy was unknowingly utilized for powering sails. Later on, wind energy emerged as a significant form of energy when it was found that it can offset approximately 2600 tons of carbon dioxide (meaning lesser the use of fossil fuels, lesser is the carbon dioxide emission). Thus wind energy became very useful in generating electricity. A single wind turbine can power 500 homes. Historically windmills have been used for the grinding of the grains into flour, for taking out water from wells and other smaller jobs.
The main source of this renewable form of energy is the Sun. The sun heats up the earth. As the earth rotates continuously and does not have a regular surface everywhere, there is no uniformity in heating up of the earth’s surface. This variation in temperature causes irregularities in air pressure and cause wind to move from high pressure belt to low pressure belt. Wind is indeed a continuous source of energy but is highly unpredictable.
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