How Does Nature Balance Water?

Our Earth and atmosphere are primarily made up of water. 

Water evaporates  from the ocean with the natural solar heating, and water vapor is carried everywhere in the atmosphere by air currents. Eventually, at a certain height it cools down and water droplets in the vapor condense to form those beautiful clouds. If a cloud grows large enough, it gets heavy and moves down with the weight. That is when the droplets coalesce and fall as precipitation, mostly as rain, or sometimes as snow or ice. Most of the water evaporated into the atmosphere falls as precipitation on the ocean, and remaining most of it falls on the ground. The water that falls on ground has various paths to chose from. Some of the water runs into streams, lakes, and rivers, which return the water to the ocean. Some of the water is absorbed by the plants, while  some just seeps into the ground and becomes groundwater. 

In any case, our mother Nature strives really hard to maintain the precious Hydrological Cycle which is essentially a closed loop cycle of water from the ocean to the atmosphere to the land and back to ocean and other reservoirs. We have to realize that hydrological cycle is one of the most intricately designed system that helps sustain Our Life on this planet Earth.