But those natural actions have started to become altered noticeably by man's activities, and not for very long. Evaporated water is chemically pure. During the cycle the water is purified . The force that moves that gigantic machine is solar energy. Evaporated water cannot leave the atmosphere, so that sooner or later, it ends up returning to the Earth in the form of precipitation.
Precipitated water begins to infiltrate, that is, to pass through to the interior of the ground.
This cycle is carried out by water passing through its three states, through the processes of evaporation, condensation, and precipitation. The Sun and the force of gravity give water its movement, without them the cycle could not be carried out. Both of them at the same time make a large natural pump that constantly pushes and makes water run. The birth of a river. The rainwater that doesn't penetrate the ground runs freely over its surface.