We have wind due to the movement of air currents from a region of high pressure to that of low pressure and the difference in pressure will determine how strong the wind is. Due to the rotation of the Earth, wind flows round the high and low pressure areas.
2 Additional Answers
Wind is caused by natural circulation of the air and atmosphere. Air flows are created due to the varying of barometric pressure, temperature fluctuations, and the effects the Earth's rotation has on all of them.
There are many reasons for the answer. The simple answer is the rotation of the earth and how that wind translates in atmosphere of changing temperatures. .
Air is often seen as a universal power or pure substance. Its supposed fundamental importance to life can be seen in words such as aspire, inspire, perspire and spirit, all derived from the Latin spirare.