Solar energy is responsible for the blowing of the wind. The sunrays fall on the whole earth. But the intensity of sunrays is much more stronger near the equator of the earth than in the polar regions. Due to more intense sun-heat, the air near the surface of the earth in equatorial regions becomes quite hot. This hot air, being lighter, rises upwards. The cooler air from the polar regions of the earth starts flowing towards the equatorial regions of the earth to fill the space vacated by the hot rising air. In this way, air flows from the higher pressure regions to the low pressure regions of the earth. This flow of air from one place to another constitutes wind.