There are a number of processes in the world that are all equally responsible in the creation of deserts. First off, there is a low-pressure band along the equator. The low air pressure is hot air. Hot air absorbs the moisture held on land. Absorbing the moisture the hot air rises, moving away from the Earth's surface it cools. This process of cooling creates clouds. Cold air in which the clouds are now in, can't hold any more moisture triggering rain to fall. In the tropics and places near the equator it rains at 3:00pm every day. After this cold air descends it creates high pressure. …
