The equator is the region which receives maximum amount of sunlight. Due to this, the area experiences more heat and the air in this region becomes warm, and less dense. It then slowly rises up, forming a low pressure zone. This air is then carried by the wind towards both the poles. The wind that carries the air towards the north gets slightly deflected towards the right side because of a force known as the Coriolis force. This force is created due to the rotation of the earth.
